diff options
Diffstat (limited to 'erts/doc/src/erl_nif.xml')
| -rw-r--r-- | erts/doc/src/erl_nif.xml | 571 |
1 files changed, 371 insertions, 200 deletions
diff --git a/erts/doc/src/erl_nif.xml b/erts/doc/src/erl_nif.xml index bbc12b0a56..d74ae23a93 100644 --- a/erts/doc/src/erl_nif.xml +++ b/erts/doc/src/erl_nif.xml @@ -546,8 +546,8 @@ int writeiovec(ErlNifEnv *env, ERL_NIF_TERM term, ERL_NIF_TERM *tail, <p>Many operations communicating with a process executing a dirty NIF can, however, complete while it executes the dirty NIF. For example, retrieving information about it through - <seealso marker="erlang:process_info/1"> - <c>erlang:process_info</c></seealso>, setting its group leader, + <seealso marker="erlang#process_info/1"> + <c>process_info</c></seealso>, setting its group leader, register/unregister its name, and so on.</p> <p>Termination of a process executing a dirty NIF can only be completed up to a certain point while it executes the dirty NIF. @@ -783,14 +783,16 @@ typedef struct { <p>A process identifier (pid). In contrast to pid terms (instances of <c>ERL_NIF_TERM</c>), <c>ErlNifPid</c>s are self-contained and not bound to any <seealso marker="#ErlNifEnv">environment</seealso>. - <c>ErlNifPid</c> is an opaque type.</p> + <c>ErlNifPid</c> is an opaque type. It can be copied, moved + in memory, forgotten, and so on.</p> </item> <tag><marker id="ErlNifPort"/><c>ErlNifPort</c></tag> <item> <p>A port identifier. In contrast to port ID terms (instances of <c>ERL_NIF_TERM</c>), <c>ErlNifPort</c>s are self-contained and not bound to any <seealso marker="#ErlNifEnv">environment</seealso>. - <c>ErlNifPort</c> is an opaque type.</p> + <c>ErlNifPort</c> is an opaque type. It can be copied, moved + in memory, forgotten, and so on.</p> </item> <tag><marker id="ErlNifResourceType"/><c>ErlNifResourceType</c></tag> <item> @@ -963,7 +965,7 @@ typedef struct { <funcs> <func> - <name><ret>void *</ret><nametext>enif_alloc(size_t size)</nametext></name> + <name since=""><ret>void *</ret><nametext>enif_alloc(size_t size)</nametext></name> <fsummary>Allocate dynamic memory.</fsummary> <desc> <p>Allocates memory of <c>size</c> bytes.</p> @@ -974,7 +976,7 @@ typedef struct { </func> <func> - <name><ret>int</ret> + <name since=""><ret>int</ret> <nametext>enif_alloc_binary(size_t size, ErlNifBinary* bin)</nametext> </name> <fsummary>Create a new binary.</fsummary> @@ -998,7 +1000,7 @@ typedef struct { </func> <func> - <name><ret>ErlNifEnv *</ret><nametext>enif_alloc_env()</nametext></name> + <name since="OTP R14B"><ret>ErlNifEnv *</ret><nametext>enif_alloc_env()</nametext></name> <fsummary>Create a new environment.</fsummary> <desc> <p>Allocates a new process independent environment. The environment can @@ -1012,7 +1014,7 @@ typedef struct { </func> <func> - <name><ret>void *</ret><nametext>enif_alloc_resource(ErlNifResourceType* + <name since="OTP R13B04"><ret>void *</ret><nametext>enif_alloc_resource(ErlNifResourceType* type, unsigned size)</nametext></name> <fsummary>Allocate a memory-managed resource object.</fsummary> <desc> @@ -1022,7 +1024,7 @@ typedef struct { </func> <func> - <name><ret>size_t</ret><nametext>enif_binary_to_term(ErlNifEnv *env, + <name since="OTP 19.0"><ret>size_t</ret><nametext>enif_binary_to_term(ErlNifEnv *env, const unsigned char* data, size_t size, ERL_NIF_TERM *term, ErlNifBinaryToTerm opts)</nametext></name> <fsummary>Create a term from the external format.</fsummary> @@ -1047,7 +1049,7 @@ typedef struct { </func> <func> - <name><ret>void</ret><nametext>enif_clear_env(ErlNifEnv* env)</nametext> + <name since="OTP R14B"><ret>void</ret><nametext>enif_clear_env(ErlNifEnv* env)</nametext> </name> <fsummary>Clear an environment for reuse.</fsummary> <desc> @@ -1058,7 +1060,7 @@ typedef struct { </func> <func> - <name><ret>int</ret> + <name since="OTP R13B04"><ret>int</ret> <nametext>enif_compare(ERL_NIF_TERM lhs, ERL_NIF_TERM rhs)</nametext> </name> <fsummary>Compare two terms.</fsummary> @@ -1073,7 +1075,7 @@ typedef struct { </func> <func> - <name><ret>int</ret><nametext>enif_compare_monitors(const ErlNifMonitor + <name since="OTP 20.0"><ret>int</ret><nametext>enif_compare_monitors(const ErlNifMonitor *monitor1, const ErlNifMonitor *monitor2)</nametext></name> <fsummary>Compare two monitors.</fsummary> <desc> @@ -1088,7 +1090,21 @@ typedef struct { </func> <func> - <name><ret>void</ret> + <name since="OTP 22.0"><ret>int</ret> + <nametext>enif_compare_pids(const ErlNifPid *pid1, const ErlNifPid *pid2) + </nametext></name> + <fsummary>Compare two pids.</fsummary> + <desc> + <p>Compares two <seealso marker="#ErlNifPid"><c>ErlNifPid</c> + </seealso>s according to term order.</p> + <p>Returns <c>0</c> if <c>pid1</c> and <c>pid2</c> are equal, + < <c>0</c> if <c>pid1</c> < <c>pid2</c>, and + > <c>0</c> if <c>pid1</c> > <c>pid2</c>.</p> + </desc> + </func> + + <func> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_cond_broadcast(ErlNifCond *cnd)</nametext></name> <fsummary></fsummary> <desc> @@ -1098,7 +1114,7 @@ typedef struct { </func> <func> - <name><ret>ErlNifCond *</ret> + <name since="OTP R13B04"><ret>ErlNifCond *</ret> <nametext>enif_cond_create(char *name)</nametext></name> <fsummary></fsummary> <desc> @@ -1108,7 +1124,7 @@ typedef struct { </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_cond_destroy(ErlNifCond *cnd)</nametext></name> <fsummary></fsummary> <desc> @@ -1118,7 +1134,7 @@ typedef struct { </func> <func> - <name><ret>char*</ret> + <name since="OTP 21.0"><ret>char*</ret> <nametext>enif_cond_name(ErlNifCond* cnd)</nametext></name> <fsummary></fsummary> <desc> @@ -1128,7 +1144,7 @@ typedef struct { </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_cond_signal(ErlNifCond *cnd)</nametext></name> <fsummary></fsummary> <desc> @@ -1138,7 +1154,7 @@ typedef struct { </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_cond_wait(ErlNifCond *cnd, ErlNifMutex *mtx)</nametext> </name> <fsummary></fsummary> @@ -1149,7 +1165,7 @@ typedef struct { </func> <func> - <name><ret>int</ret> + <name since="OTP R16B"><ret>int</ret> <nametext>enif_consume_timeslice(ErlNifEnv *env, int percent)</nametext> </name> <fsummary></fsummary> @@ -1184,7 +1200,7 @@ typedef struct { </func> <func> - <name><ret>ErlNifTime</ret><nametext>enif_convert_time_unit(ErlNifTime + <name since="OTP 18.3"><ret>ErlNifTime</ret><nametext>enif_convert_time_unit(ErlNifTime val, ErlNifTimeUnit from, ErlNifTimeUnit to)</nametext></name> <fsummary>Convert time unit of a time value.</fsummary> <desc> @@ -1209,7 +1225,7 @@ typedef struct { </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP 19.0"><ret>ERL_NIF_TERM</ret> <nametext>enif_cpu_time(ErlNifEnv *)</nametext></name> <fsummary></fsummary> <desc> @@ -1225,8 +1241,8 @@ typedef struct { </func> <func> - <name><ret>int</ret><nametext>enif_demonitor_process(ErlNifEnv* caller_env, void* obj, - const ErlNifMonitor* mon)</nametext></name> + <name since="OTP 20.0"><ret>int</ret><nametext>enif_demonitor_process(ErlNifEnv* caller_env, + void* obj, const ErlNifMonitor* mon)</nametext></name> <fsummary>Cancel a process monitor.</fsummary> <desc> <marker id="enif_demonitor_process"></marker> @@ -1252,7 +1268,7 @@ typedef struct { </func> <func> - <name><ret>int</ret> + <name since="OTP R13B04"><ret>int</ret> <nametext>enif_equal_tids(ErlNifTid tid1, ErlNifTid tid2)</nametext> </name> <fsummary></fsummary> @@ -1263,7 +1279,7 @@ typedef struct { </func> <func> - <name><ret>int</ret><nametext>enif_fprintf(FILE *stream, const char *format, ...)</nametext></name> + <name since="OTP 21.0"><ret>int</ret><nametext>enif_fprintf(FILE *stream, const char *format, ...)</nametext></name> <fsummary>Format strings and Erlang terms.</fsummary> <desc> <p>Similar to <c>fprintf</c> but this format string also accepts @@ -1276,7 +1292,7 @@ typedef struct { </func> <func> - <name><ret>void</ret><nametext>enif_free(void* ptr)</nametext></name> + <name since=""><ret>void</ret><nametext>enif_free(void* ptr)</nametext></name> <fsummary>Free dynamic memory.</fsummary> <desc> <p>Frees memory allocated by @@ -1285,7 +1301,7 @@ typedef struct { </func> <func> - <name><ret>void</ret> + <name since="OTP R14B"><ret>void</ret> <nametext>enif_free_env(ErlNifEnv* env)</nametext></name> <fsummary>Free an environment allocated with enif_alloc_env.</fsummary> <desc> @@ -1296,7 +1312,7 @@ typedef struct { </func> <func> - <name><ret>void</ret> + <name since="OTP 20.1"><ret>void</ret> <nametext>enif_free_iovec(ErlNifIOvec* iov)</nametext></name> <fsummary>Free an ErlIOVec</fsummary> <desc> @@ -1321,7 +1337,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_atom(ErlNifEnv* env, ERL_NIF_TERM + <name since="OTP R13B04"><ret>int</ret><nametext>enif_get_atom(ErlNifEnv* env, ERL_NIF_TERM term, char* buf, unsigned size, ErlNifCharEncoding encode)</nametext> </name> <fsummary>Get the text representation of an atom term.</fsummary> @@ -1337,7 +1353,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_atom_length(ErlNifEnv* env, + <name since="OTP R14B"><ret>int</ret><nametext>enif_get_atom_length(ErlNifEnv* env, ERL_NIF_TERM term, unsigned* len, ErlNifCharEncoding encode)</nametext> </name> <fsummary>Get the length of atom <c>term</c>.</fsummary> @@ -1351,7 +1367,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_double(ErlNifEnv* env, + <name since="OTP R13B04"><ret>int</ret><nametext>enif_get_double(ErlNifEnv* env, ERL_NIF_TERM term, double* dp)</nametext></name> <fsummary>Read a floating-point number term.</fsummary> <desc> @@ -1362,7 +1378,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_int(ErlNifEnv* env, ERL_NIF_TERM + <name since=""><ret>int</ret><nametext>enif_get_int(ErlNifEnv* env, ERL_NIF_TERM term, int* ip)</nametext></name> <fsummary>Read an integer term.</fsummary> <desc> @@ -1373,7 +1389,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_int64(ErlNifEnv* env, ERL_NIF_TERM + <name since="OTP R14B"><ret>int</ret><nametext>enif_get_int64(ErlNifEnv* env, ERL_NIF_TERM term, ErlNifSInt64* ip)</nametext></name> <fsummary>Read a 64-bit integer term.</fsummary> <desc> @@ -1384,7 +1400,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_local_pid(ErlNifEnv* env, + <name since="OTP R14B"><ret>int</ret><nametext>enif_get_local_pid(ErlNifEnv* env, ERL_NIF_TERM term, ErlNifPid* pid)</nametext></name> <fsummary>Read a local pid term.</fsummary> <desc> @@ -1392,11 +1408,14 @@ enif_free_iovec(iovec);]]></code> initializes the pid variable <c>*pid</c> from it and returns <c>true</c>. Otherwise returns <c>false</c>. No check is done to see if the process is alive.</p> + <note><p><c>enif_get_local_pid</c> will return false if argument + <c>term</c> is the atom <seealso marker="#enif_make_pid"> + <c>undefined</c></seealso>.</p></note> </desc> </func> <func> - <name><ret>int</ret><nametext>enif_get_local_port(ErlNifEnv* env, + <name since="OTP 19.0"><ret>int</ret><nametext>enif_get_local_port(ErlNifEnv* env, ERL_NIF_TERM term, ErlNifPort* port_id)</nametext></name> <fsummary>Read a local port term.</fsummary> <desc> @@ -1408,7 +1427,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_list_cell(ErlNifEnv* env, + <name since=""><ret>int</ret><nametext>enif_get_list_cell(ErlNifEnv* env, ERL_NIF_TERM list, ERL_NIF_TERM* head, ERL_NIF_TERM* tail)</nametext> </name> <fsummary>Get head and tail from a list.</fsummary> @@ -1420,7 +1439,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_list_length(ErlNifEnv* env, + <name since="OTP R14B"><ret>int</ret><nametext>enif_get_list_length(ErlNifEnv* env, ERL_NIF_TERM term, unsigned* len)</nametext></name> <fsummary>Get the length of list <c>term</c>.</fsummary> <desc> @@ -1431,7 +1450,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_long(ErlNifEnv* env, ERL_NIF_TERM + <name since="OTP R13B04"><ret>int</ret><nametext>enif_get_long(ErlNifEnv* env, ERL_NIF_TERM term, long int* ip)</nametext></name> <fsummary>Read a long integer term.</fsummary> <desc> @@ -1442,7 +1461,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_map_size(ErlNifEnv* env, + <name since="OTP 18.0"><ret>int</ret><nametext>enif_get_map_size(ErlNifEnv* env, ERL_NIF_TERM term, size_t *size)</nametext></name> <fsummary>Read the size of a map term.</fsummary> <desc> @@ -1454,7 +1473,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_map_value(ErlNifEnv* env, + <name since="OTP 18.0"><ret>int</ret><nametext>enif_get_map_value(ErlNifEnv* env, ERL_NIF_TERM map, ERL_NIF_TERM key, ERL_NIF_TERM* value)</nametext> </name> <fsummary>Get the value of a key in a map.</fsummary> @@ -1467,7 +1486,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_resource(ErlNifEnv* env, + <name since="OTP R13B04"><ret>int</ret><nametext>enif_get_resource(ErlNifEnv* env, ERL_NIF_TERM term, ErlNifResourceType* type, void** objp)</nametext> </name> <fsummary>Get the pointer to a resource object.</fsummary> @@ -1476,11 +1495,14 @@ enif_free_iovec(iovec);]]></code> <c>term</c>.</p> <p>Returns <c>true</c> on success, or <c>false</c> if <c>term</c> is not a handle to a resource object of type <c>type</c>.</p> + <p><c>enif_get_resource</c> does not add a reference to the resource + object. However, the pointer received in <c>*objp</c> is guaranteed to + be valid at least as long as the resource handle <c>term</c> is valid.</p> </desc> </func> <func> - <name><ret>int</ret><nametext>enif_get_string(ErlNifEnv* env, + <name since="OTP R13B04"><ret>int</ret><nametext>enif_get_string(ErlNifEnv* env, ERL_NIF_TERM list, char* buf, unsigned size, ErlNifCharEncoding encode)</nametext></name> <fsummary>Get a C-string from a list.</fsummary> @@ -1504,7 +1526,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_tuple(ErlNifEnv* env, ERL_NIF_TERM + <name since="OTP R13B04"><ret>int</ret><nametext>enif_get_tuple(ErlNifEnv* env, ERL_NIF_TERM term, int* arity, const ERL_NIF_TERM** array)</nametext></name> <fsummary>Inspect the elements of a tuple.</fsummary> <desc> @@ -1520,7 +1542,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_uint(ErlNifEnv* env, ERL_NIF_TERM + <name since="OTP R13B04"><ret>int</ret><nametext>enif_get_uint(ErlNifEnv* env, ERL_NIF_TERM term, unsigned int* ip)</nametext></name> <fsummary>Read an unsigned integer term.</fsummary> <desc> @@ -1532,7 +1554,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_uint64(ErlNifEnv* env, + <name since="OTP R14B"><ret>int</ret><nametext>enif_get_uint64(ErlNifEnv* env, ERL_NIF_TERM term, ErlNifUInt64* ip)</nametext></name> <fsummary>Read an unsigned 64-bit integer term.</fsummary> <desc> @@ -1544,7 +1566,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_get_ulong(ErlNifEnv* env, ERL_NIF_TERM + <name since=""><ret>int</ret><nametext>enif_get_ulong(ErlNifEnv* env, ERL_NIF_TERM term, unsigned long* ip)</nametext></name> <fsummary>Read an unsigned integer term.</fsummary> <desc> @@ -1557,7 +1579,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_getenv(const char* key, char* value, + <name since="OTP 18.2"><ret>int</ret><nametext>enif_getenv(const char* key, char* value, size_t *value_size)</nametext></name> <fsummary>Get the value of an environment variable.</fsummary> <desc> @@ -1567,7 +1589,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_has_pending_exception(ErlNifEnv* env, + <name since="OTP 18.0"><ret>int</ret><nametext>enif_has_pending_exception(ErlNifEnv* env, ERL_NIF_TERM* reason)</nametext></name> <fsummary>Check if an exception has been raised.</fsummary> <desc> @@ -1588,7 +1610,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name> + <name since="OTP 20.0"> <ret>ErlNifUInt64</ret> <nametext>enif_hash(ErlNifHash type, ERL_NIF_TERM term, ErlNifUInt64 salt)</nametext> </name> @@ -1601,7 +1623,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_inspect_binary(ErlNifEnv* env, + <name since=""><ret>int</ret><nametext>enif_inspect_binary(ErlNifEnv* env, ERL_NIF_TERM bin_term, ErlNifBinary* bin)</nametext></name> <fsummary>Inspect the content of a binary.</fsummary> <desc> @@ -1613,7 +1635,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_inspect_iolist_as_binary(ErlNifEnv* + <name since="OTP R13B04"><ret>int</ret><nametext>enif_inspect_iolist_as_binary(ErlNifEnv* env, ERL_NIF_TERM term, ErlNifBinary* bin)</nametext></name> <fsummary>Inspect the content of an iolist.</fsummary> <desc> @@ -1627,7 +1649,7 @@ enif_free_iovec(iovec);]]></code> </func> <func> - <name><ret>int</ret><nametext>enif_inspect_iovec(ErlNifEnv* + <name since="OTP 20.1"><ret>int</ret><nametext>enif_inspect_iovec(ErlNifEnv* env, size_t max_elements, ERL_NIF_TERM iovec_term, ERL_NIF_TERM* tail, ErlNifIOVec** iovec)</nametext></name> <fsummary>Inspect a list of binaries as an ErlNifIOVec.</fsummary> @@ -1667,7 +1689,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ErlNifIOQueue *</ret> + <name since="OTP 20.1"><ret>ErlNifIOQueue *</ret> <nametext>enif_ioq_create(ErlNifIOQueueOpts opts)</nametext></name> <fsummary>Create a new IO Queue</fsummary> <desc> @@ -1678,7 +1700,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>void</ret> + <name since="OTP 20.1"><ret>void</ret> <nametext>enif_ioq_destroy(ErlNifIOQueue *q)</nametext></name> <fsummary>Destroy an IO Queue and free it's content</fsummary> <desc> @@ -1687,7 +1709,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP 20.1"><ret>int</ret> <nametext>enif_ioq_deq(ErlNifIOQueue *q, size_t count, size_t *size)</nametext></name> <fsummary>Dequeue count bytes from the IO Queue</fsummary> <desc> @@ -1700,7 +1722,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP 20.1"><ret>int</ret> <nametext>enif_ioq_enq_binary(ErlNifIOQueue *q, ErlNifBinary *bin, size_t skip)</nametext></name> <fsummary>Enqueue the binary into the IO Queue</fsummary> <desc> @@ -1713,7 +1735,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP 20.1"><ret>int</ret> <nametext>enif_ioq_enqv(ErlNifIOQueue *q, ErlNifIOVec *iovec, size_t skip)</nametext></name> <fsummary>Enqueue the iovec into the IO Queue</fsummary> <desc> @@ -1724,7 +1746,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>SysIOVec *</ret> + <name since="OTP 20.1"><ret>SysIOVec *</ret> <nametext>enif_ioq_peek(ErlNifIOQueue *q, int *iovlen)</nametext></name> <fsummary>Peek inside the IO Queue</fsummary> <desc> @@ -1738,7 +1760,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP 21.0"><ret>int</ret> <nametext>enif_ioq_peek_head(ErlNifEnv *env, ErlNifIOQueue *q, size_t *size, ERL_NIF_TERM *bin_term)</nametext></name> <fsummary>Peek the head of the IO Queue.</fsummary> <desc> @@ -1753,7 +1775,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>size_t</ret> + <name since="OTP 20.1"><ret>size_t</ret> <nametext>enif_ioq_size(ErlNifIOQueue *q)</nametext></name> <fsummary>Get the current size of the IO Queue</fsummary> <desc> @@ -1762,7 +1784,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP R13B04"><ret>int</ret> <nametext>enif_is_atom(ErlNifEnv* env, ERL_NIF_TERM term)</nametext> </name> <fsummary>Determine if a term is an atom.</fsummary> @@ -1772,7 +1794,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since=""><ret>int</ret> <nametext>enif_is_binary(ErlNifEnv* env, ERL_NIF_TERM term)</nametext> </name> <fsummary>Determine if a term is a binary.</fsummary> @@ -1782,7 +1804,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP 19.0"><ret>int</ret> <nametext>enif_is_current_process_alive(ErlNifEnv* env)</nametext> </name> <fsummary>Determine if currently executing process is alive.</fsummary> @@ -1795,7 +1817,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_is_empty_list(ErlNifEnv* env, + <name since="OTP R13B04"><ret>int</ret><nametext>enif_is_empty_list(ErlNifEnv* env, ERL_NIF_TERM term)</nametext></name> <fsummary>Determine if a term is an empty list.</fsummary> <desc> @@ -1804,7 +1826,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_is_exception(ErlNifEnv* env, + <name since="OTP R14B03"><ret>int</ret><nametext>enif_is_exception(ErlNifEnv* env, ERL_NIF_TERM term)</nametext></name> <fsummary>Determine if a term is an exception.</fsummary> <desc><marker id="enif_is_exception"/> @@ -1813,7 +1835,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_is_fun(ErlNifEnv* env, ERL_NIF_TERM + <name since="OTP R13B04"><ret>int</ret><nametext>enif_is_fun(ErlNifEnv* env, ERL_NIF_TERM term)</nametext></name> <fsummary>Determine if a term is a fun.</fsummary> <desc> @@ -1822,7 +1844,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_is_identical(ERL_NIF_TERM lhs, + <name since="OTP R13B04"><ret>int</ret><nametext>enif_is_identical(ERL_NIF_TERM lhs, ERL_NIF_TERM rhs)</nametext></name> <fsummary>Erlang operator =:=.</fsummary> <desc> @@ -1832,7 +1854,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP R14B"><ret>int</ret> <nametext>enif_is_list(ErlNifEnv* env, ERL_NIF_TERM term)</nametext> </name> <fsummary>Determine if a term is a list.</fsummary> @@ -1842,7 +1864,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_is_map(ErlNifEnv* env, ERL_NIF_TERM + <name since="OTP 18.0"><ret>int</ret><nametext>enif_is_map(ErlNifEnv* env, ERL_NIF_TERM term)</nametext></name> <fsummary>Determine if a term is a map.</fsummary> <desc> @@ -1852,7 +1874,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_is_number(ErlNifEnv* env, ERL_NIF_TERM + <name since="OTP R15B"><ret>int</ret><nametext>enif_is_number(ErlNifEnv* env, ERL_NIF_TERM term)</nametext></name> <fsummary>Determine if a term is a number (integer or float).</fsummary> <desc> @@ -1861,7 +1883,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP R13B04"><ret>int</ret> <nametext>enif_is_pid(ErlNifEnv* env, ERL_NIF_TERM term)</nametext> </name> <fsummary>Determine if a term is a pid.</fsummary> @@ -1871,7 +1893,18 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP 22.0"><ret>int</ret> + <nametext>enif_is_pid_undefined(const ErlNifPid* pid)</nametext></name> + <fsummary>Determine if pid is undefined.</fsummary> + <desc> + <p>Returns <c>true</c> if <c>pid</c> has been set as undefined by + <seealso marker="#enif_set_pid_undefined"><c>enif_set_pid_undefined</c> + </seealso>.</p> + </desc> + </func> + + <func> + <name since="OTP R13B04"><ret>int</ret> <nametext>enif_is_port(ErlNifEnv* env, ERL_NIF_TERM term)</nametext> </name> <fsummary>Determine if a term is a port.</fsummary> @@ -1881,7 +1914,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_is_port_alive(ErlNifEnv* env, + <name since="OTP 19.0"><ret>int</ret><nametext>enif_is_port_alive(ErlNifEnv* env, ErlNifPort *port_id)</nametext></name> <fsummary>Determine if a local port is alive.</fsummary> <desc> @@ -1893,7 +1926,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_is_process_alive(ErlNifEnv* env, + <name since="OTP 19.0"><ret>int</ret><nametext>enif_is_process_alive(ErlNifEnv* env, ErlNifPid *pid)</nametext></name> <fsummary>Determine if a local process is alive.</fsummary> <desc> @@ -1905,7 +1938,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP R13B04"><ret>int</ret> <nametext>enif_is_ref(ErlNifEnv* env, ERL_NIF_TERM term)</nametext> </name> <fsummary>Determine if a term is a reference.</fsummary> @@ -1915,7 +1948,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP R14B"><ret>int</ret> <nametext>enif_is_tuple(ErlNifEnv* env, ERL_NIF_TERM term)</nametext> </name> <fsummary>Determine if a term is a tuple.</fsummary> @@ -1925,7 +1958,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP R14B"><ret>int</ret> <nametext>enif_keep_resource(void* obj)</nametext> </name> <fsummary>Add a reference to a resource object.</fsummary> @@ -1941,7 +1974,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since=""><ret>ERL_NIF_TERM</ret> <nametext>enif_make_atom(ErlNifEnv* env, const char* name)</nametext> </name> <fsummary>Create an atom term.</fsummary> @@ -1955,7 +1988,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_atom_len(ErlNifEnv* env, + <name since="OTP R14B"><ret>ERL_NIF_TERM</ret><nametext>enif_make_atom_len(ErlNifEnv* env, const char* name, size_t len)</nametext></name> <fsummary>Create an atom term.</fsummary> <desc> @@ -1969,7 +2002,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since=""><ret>ERL_NIF_TERM</ret> <nametext>enif_make_badarg(ErlNifEnv* env)</nametext></name> <fsummary>Make a badarg exception.</fsummary> <desc> @@ -1997,7 +2030,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since=""><ret>ERL_NIF_TERM</ret> <nametext>enif_make_binary(ErlNifEnv* env, ErlNifBinary* bin)</nametext> </name> <fsummary>Make a binary term.</fsummary> @@ -2010,7 +2043,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_copy(ErlNifEnv* dst_env, + <name since="OTP R14B"><ret>ERL_NIF_TERM</ret><nametext>enif_make_copy(ErlNifEnv* dst_env, ERL_NIF_TERM src_term)</nametext></name> <fsummary>Make a copy of a term.</fsummary> <desc> @@ -2021,7 +2054,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret> <nametext>enif_make_double(ErlNifEnv* env, double d)</nametext></name> <fsummary>Create a floating-point term.</fsummary> <desc> @@ -2033,7 +2066,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_make_existing_atom(ErlNifEnv* env, + <name since="OTP R13B04"><ret>int</ret><nametext>enif_make_existing_atom(ErlNifEnv* env, const char* name, ERL_NIF_TERM* atom, ErlNifCharEncoding encode)</nametext></name> <fsummary>Create an existing atom term.</fsummary> @@ -2049,7 +2082,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_make_existing_atom_len(ErlNifEnv* env, + <name since="OTP R14B"><ret>int</ret><nametext>enif_make_existing_atom_len(ErlNifEnv* env, const char* name, size_t len, ERL_NIF_TERM* atom, ErlNifCharEncoding encoding)</nametext></name> <fsummary>Create an existing atom term.</fsummary> @@ -2065,7 +2098,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </desc> </func> - <func><name><ret>ERL_NIF_TERM</ret> + <func><name since=""><ret>ERL_NIF_TERM</ret> <nametext>enif_make_int(ErlNifEnv* env, int i)</nametext></name> <fsummary>Create an integer term.</fsummary> <desc> @@ -2074,7 +2107,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP R14B"><ret>ERL_NIF_TERM</ret> <nametext>enif_make_int64(ErlNifEnv* env, ErlNifSInt64 i)</nametext> </name> <fsummary>Create an integer term.</fsummary> @@ -2084,7 +2117,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since=""><ret>ERL_NIF_TERM</ret> <nametext>enif_make_list(ErlNifEnv* env, unsigned cnt, ...)</nametext> </name> <fsummary>Create a list term.</fsummary> @@ -2097,24 +2130,24 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret> <nametext>enif_make_list1(ErlNifEnv* env, ERL_NIF_TERM e1)</nametext> </name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_list2(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_list2(ErlNifEnv* env, ERL_NIF_TERM e1, ERL_NIF_TERM e2)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_list3(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_list3(ErlNifEnv* env, ERL_NIF_TERM e1, ERL_NIF_TERM e2, ERL_NIF_TERM e3)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_list4(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_list4(ErlNifEnv* env, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e4)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_list5(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_list5(ErlNifEnv* env, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e5)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_list6(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_list6(ErlNifEnv* env, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e6)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_list7(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_list7(ErlNifEnv* env, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e7)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_list8(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_list8(ErlNifEnv* env, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e8)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_list9(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_list9(ErlNifEnv* env, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e9)</nametext></name> <fsummary>Create a list term.</fsummary> <desc> @@ -2126,7 +2159,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_list_cell(ErlNifEnv* + <name since=""><ret>ERL_NIF_TERM</ret><nametext>enif_make_list_cell(ErlNifEnv* env, ERL_NIF_TERM head, ERL_NIF_TERM tail)</nametext></name> <fsummary>Create a list cell.</fsummary> <desc> @@ -2135,7 +2168,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret> <nametext>enif_make_list_from_array(ErlNifEnv* env, const ERL_NIF_TERM arr[], unsigned cnt)</nametext></name> <fsummary>Create a list term from an array.</fsummary> @@ -2147,7 +2180,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret> <nametext>enif_make_long(ErlNifEnv* env, long int i)</nametext></name> <fsummary>Create an integer term from a long int.</fsummary> <desc> @@ -2156,7 +2189,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_make_map_put(ErlNifEnv* env, + <name since="OTP 18.0"><ret>int</ret><nametext>enif_make_map_put(ErlNifEnv* env, ERL_NIF_TERM map_in, ERL_NIF_TERM key, ERL_NIF_TERM value, ERL_NIF_TERM* map_out)</nametext></name> <fsummary>Insert key-value pair in map.</fsummary> @@ -2172,7 +2205,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_make_map_remove(ErlNifEnv* env, + <name since="OTP 18.0"><ret>int</ret><nametext>enif_make_map_remove(ErlNifEnv* env, ERL_NIF_TERM map_in, ERL_NIF_TERM key, ERL_NIF_TERM* map_out)</nametext> </name> <fsummary>Remove key from map.</fsummary> @@ -2188,7 +2221,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_make_map_update(ErlNifEnv* env, + <name since="OTP 18.0"><ret>int</ret><nametext>enif_make_map_update(ErlNifEnv* env, ERL_NIF_TERM map_in, ERL_NIF_TERM key, ERL_NIF_TERM new_value, ERL_NIF_TERM* map_out)</nametext></name> <fsummary>Replace value for key in map.</fsummary> @@ -2203,7 +2236,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP 21.0"><ret>int</ret> <nametext>enif_make_map_from_arrays(ErlNifEnv* env, ERL_NIF_TERM keys[], ERL_NIF_TERM values[], size_t cnt, ERL_NIF_TERM *map_out)</nametext></name> <fsummary>Make map term from the given keys and values.</fsummary> @@ -2217,7 +2250,19 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>unsigned char *</ret><nametext>enif_make_new_binary(ErlNifEnv* + <name since="OTP 22.0"><ret>ERL_NIF_TERM</ret> + <nametext>enif_make_monitor_term(ErlNifEnv* env, const ErlNifMonitor* mon)</nametext></name> + <fsummary>Make monitor term from the given monitor identifier.</fsummary> + <desc> + <p>Creates a term identifying the given monitor received from + <seealso marker="#enif_monitor_process"><c>enif_monitor_process</c> + </seealso>.</p> + <p>This function is primarily intended for debugging purpose.</p> + </desc> + </func> + + <func> + <name since="OTP R14B"><ret>unsigned char *</ret><nametext>enif_make_new_binary(ErlNifEnv* env, size_t size, ERL_NIF_TERM* termp)</nametext></name> <fsummary>Allocate and create a new binary term.</fsummary> <desc> @@ -2233,7 +2278,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP 18.0"><ret>ERL_NIF_TERM</ret> <nametext>enif_make_new_map(ErlNifEnv* env)</nametext></name> <fsummary>Make an empty map term.</fsummary> <desc> @@ -2242,17 +2287,18 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP R14B"><ret>ERL_NIF_TERM</ret> <nametext>enif_make_pid(ErlNifEnv* env, const ErlNifPid* pid)</nametext> </name> <fsummary>Make a pid term.</fsummary> <desc> - <p>Makes a pid term from <c>*pid</c>.</p> + <p>Makes a pid term or the atom <seealso marker="#enif_set_pid_undefined"> + <c>undefined</c></seealso> from <c>*pid</c>.</p> </desc> </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret> <nametext>enif_make_ref(ErlNifEnv* env)</nametext></name> <fsummary>Create a reference.</fsummary> <desc> @@ -2262,7 +2308,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret> <nametext>enif_make_resource(ErlNifEnv* env, void* obj)</nametext> </name> <fsummary>Create an opaque handle to a resource object.</fsummary> @@ -2310,7 +2356,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP R14B"><ret>ERL_NIF_TERM</ret> <nametext>enif_make_resource_binary(ErlNifEnv* env, void* obj, const void* data, size_t size)</nametext></name> <fsummary>Create a custom binary term.</fsummary> @@ -2336,7 +2382,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret> + <name since="OTP R15B"><ret>int</ret> <nametext>enif_make_reverse_list(ErlNifEnv* env, ERL_NIF_TERM list_in, ERL_NIF_TERM *list_out)</nametext></name> <fsummary>Create the reverse of a list.</fsummary> @@ -2352,7 +2398,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_string(ErlNifEnv* env, + <name since=""><ret>ERL_NIF_TERM</ret><nametext>enif_make_string(ErlNifEnv* env, const char* string, ErlNifCharEncoding encoding)</nametext></name> <fsummary>Create a string.</fsummary> <desc> @@ -2363,7 +2409,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_string_len(ErlNifEnv* + <name since="OTP R14B"><ret>ERL_NIF_TERM</ret><nametext>enif_make_string_len(ErlNifEnv* env, const char* string, size_t len, ErlNifCharEncoding encoding)</nametext></name> <fsummary>Create a string.</fsummary> @@ -2376,7 +2422,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_sub_binary(ErlNifEnv* + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_sub_binary(ErlNifEnv* env, ERL_NIF_TERM bin_term, size_t pos, size_t size)</nametext></name> <fsummary>Make a subbinary term.</fsummary> <desc> @@ -2388,7 +2434,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple(ErlNifEnv* env, + <name since=""><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple(ErlNifEnv* env, unsigned cnt, ...)</nametext></name> <fsummary>Creates a tuple term.</fsummary> <desc> @@ -2399,23 +2445,23 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple1(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple1(ErlNifEnv* env, ERL_NIF_TERM e1)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple2(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple2(ErlNifEnv* env, ERL_NIF_TERM e1, ERL_NIF_TERM e2)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple3(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple3(ErlNifEnv* env, ERL_NIF_TERM e1, ERL_NIF_TERM e2, ERL_NIF_TERM e3)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple4(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple4(ErlNifEnv* env, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e4)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple5(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple5(ErlNifEnv* env, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e5)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple6(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple6(ErlNifEnv* env, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e6)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple7(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple7(ErlNifEnv* env, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e7)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple8(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple8(ErlNifEnv* env, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e8)</nametext></name> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple9(ErlNifEnv* env, + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple9(ErlNifEnv* env, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e9)</nametext></name> <fsummary>Create a tuple term.</fsummary> <desc> @@ -2427,7 +2473,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret> <nametext>enif_make_tuple_from_array(ErlNifEnv* env, const ERL_NIF_TERM arr[], unsigned cnt)</nametext></name> <fsummary>Create a tuple term from an array.</fsummary> @@ -2438,7 +2484,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP R13B04"><ret>ERL_NIF_TERM</ret> <nametext>enif_make_uint(ErlNifEnv* env, unsigned int i)</nametext> </name> <fsummary>Create an unsigned integer term.</fsummary> @@ -2448,7 +2494,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP R14B"><ret>ERL_NIF_TERM</ret> <nametext>enif_make_uint64(ErlNifEnv* env, ErlNifUInt64 i)</nametext> </name> <fsummary>Create an unsigned integer term.</fsummary> @@ -2458,7 +2504,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since=""><ret>ERL_NIF_TERM</ret> <nametext>enif_make_ulong(ErlNifEnv* env, unsigned long i)</nametext> </name> <fsummary>Create an integer term from an unsigned long int.</fsummary> @@ -2468,7 +2514,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_make_unique_integer(ErlNifEnv + <name since="OTP 19.0"><ret>ERL_NIF_TERM</ret><nametext>enif_make_unique_integer(ErlNifEnv *env, ErlNifUniqueInteger properties)</nametext></name> <fsummary></fsummary> <desc> @@ -2486,7 +2532,7 @@ enif_inspect_iovec(env, max_elements, term, &tail, &iovec); </func> <func> - <name><ret>int</ret><nametext>enif_map_iterator_create(ErlNifEnv *env, + <name since="OTP 18.0"><ret>int</ret><nametext>enif_map_iterator_create(ErlNifEnv *env, ERL_NIF_TERM map, ErlNifMapIterator *iter, ErlNifMapIteratorEntry entry)</nametext></name> <fsummary>Create a map iterator.</fsummary> @@ -2521,7 +2567,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>void</ret><nametext>enif_map_iterator_destroy(ErlNifEnv *env, + <name since="OTP 18.0"><ret>void</ret><nametext>enif_map_iterator_destroy(ErlNifEnv *env, ErlNifMapIterator *iter)</nametext></name> <fsummary>Destroy a map iterator.</fsummary> <desc> @@ -2532,7 +2578,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>int</ret><nametext>enif_map_iterator_get_pair(ErlNifEnv *env, + <name since="OTP 18.0"><ret>int</ret><nametext>enif_map_iterator_get_pair(ErlNifEnv *env, ErlNifMapIterator *iter, ERL_NIF_TERM *key, ERL_NIF_TERM *value)</nametext></name> <fsummary>Get key and value at current map iterator position.</fsummary> @@ -2545,7 +2591,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>int</ret><nametext>enif_map_iterator_is_head(ErlNifEnv *env, + <name since="OTP 18.0"><ret>int</ret><nametext>enif_map_iterator_is_head(ErlNifEnv *env, ErlNifMapIterator *iter)</nametext></name> <fsummary>Check if map iterator is positioned before first.</fsummary> <desc> @@ -2555,7 +2601,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>int</ret><nametext>enif_map_iterator_is_tail(ErlNifEnv *env, + <name since="OTP 18.0"><ret>int</ret><nametext>enif_map_iterator_is_tail(ErlNifEnv *env, ErlNifMapIterator *iter)</nametext></name> <fsummary>Check if map iterator is positioned after last.</fsummary> <desc> @@ -2565,7 +2611,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>int</ret><nametext>enif_map_iterator_next(ErlNifEnv *env, + <name since="OTP 18.0"><ret>int</ret><nametext>enif_map_iterator_next(ErlNifEnv *env, ErlNifMapIterator *iter)</nametext></name> <fsummary>Increment map iterator to point to next entry.</fsummary> <desc> @@ -2577,7 +2623,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>int</ret><nametext>enif_map_iterator_prev(ErlNifEnv *env, + <name since="OTP 18.0"><ret>int</ret><nametext>enif_map_iterator_prev(ErlNifEnv *env, ErlNifMapIterator *iter)</nametext></name> <fsummary>Decrement map iterator to point to previous entry.</fsummary> <desc> @@ -2589,8 +2635,8 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>int</ret><nametext>enif_monitor_process(ErlNifEnv* caller_env, void* obj, - const ErlNifPid* target_pid, ErlNifMonitor* mon)</nametext></name> + <name since="OTP 20.0"><ret>int</ret><nametext>enif_monitor_process(ErlNifEnv* caller_env, + void* obj, const ErlNifPid* target_pid, ErlNifMonitor* mon)</nametext></name> <fsummary>Monitor a process from a resource.</fsummary> <desc> <marker id="enif_monitor_process"></marker> @@ -2613,7 +2659,9 @@ enif_map_iterator_destroy(env, &iter);</code> <p>Argument <c>caller_env</c> is the environment of the calling process or callback. Must only be NULL if calling from a custom thread.</p> <p>Returns <c>0</c> on success, < 0 if no <c>down</c> callback is - provided, and > 0 if the process is no longer alive.</p> + provided, and > 0 if the process is no longer alive or if + <c>target_pid</c> is <seealso marker="#enif_set_pid_undefined"> + undefined</seealso>.</p> <p>This function is only thread-safe when the emulator with SMP support is used. It can only be used in a non-SMP emulator from a NIF-calling thread.</p> @@ -2621,7 +2669,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>ErlNifTime</ret> + <name since="OTP 18.3"><ret>ErlNifTime</ret> <nametext>enif_monotonic_time(ErlNifTimeUnit time_unit)</nametext> </name> <fsummary>Get Erlang monotonic time.</fsummary> @@ -2642,7 +2690,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>ErlNifMutex *</ret> + <name since="OTP R13B04"><ret>ErlNifMutex *</ret> <nametext>enif_mutex_create(char *name)</nametext></name> <fsummary></fsummary> <desc> @@ -2652,7 +2700,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_mutex_destroy(ErlNifMutex *mtx)</nametext></name> <fsummary></fsummary> <desc> @@ -2662,7 +2710,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_mutex_lock(ErlNifMutex *mtx)</nametext></name> <fsummary></fsummary> <desc> @@ -2672,7 +2720,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>char*</ret> + <name since="OTP 21.0"><ret>char*</ret> <nametext>enif_mutex_name(ErlNifMutex* mtx)</nametext></name> <fsummary></fsummary> <desc> @@ -2682,7 +2730,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>int</ret> + <name since="OTP R13B04"><ret>int</ret> <nametext>enif_mutex_trylock(ErlNifMutex *mtx)</nametext></name> <fsummary></fsummary> <desc> @@ -2692,7 +2740,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_mutex_unlock(ErlNifMutex *mtx)</nametext></name> <fsummary></fsummary> <desc> @@ -2702,7 +2750,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>ERL_NIF_TERM</ret> + <name since="OTP 19.0"><ret>ERL_NIF_TERM</ret> <nametext>enif_now_time(ErlNifEnv *env)</nametext></name> <fsummary></fsummary> <desc> @@ -2713,7 +2761,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>ErlNifResourceType *</ret> + <name since="OTP R13B04"><ret>ErlNifResourceType *</ret> <nametext>enif_open_resource_type(ErlNifEnv* env, const char* module_str, const char* name, ErlNifResourceDtor* dtor, ErlNifResourceFlags flags, ErlNifResourceFlags* tried)</nametext> @@ -2752,7 +2800,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>ErlNifResourceType *</ret> + <name since="OTP 20.0"><ret>ErlNifResourceType *</ret> <nametext>enif_open_resource_type_x(ErlNifEnv* env, const char* name, const ErlNifResourceTypeInit* init, ErlNifResourceFlags flags, ErlNifResourceFlags* tried)</nametext> @@ -2771,7 +2819,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>int</ret><nametext>enif_port_command(ErlNifEnv* env, const + <name since="OTP 19.0"><ret>int</ret><nametext>enif_port_command(ErlNifEnv* env, const ErlNifPort* to_port, ErlNifEnv *msg_env, ERL_NIF_TERM msg)</nametext> </name> <fsummary>Send a port_command to to_port.</fsummary> @@ -2814,7 +2862,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>void *</ret> + <name since="OTP R13B04"><ret>void *</ret> <nametext>enif_priv_data(ErlNifEnv* env)</nametext></name> <fsummary>Get the private data of a NIF library.</fsummary> <desc> @@ -2825,7 +2873,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_raise_exception(ErlNifEnv* + <name since="OTP 18.0"><ret>ERL_NIF_TERM</ret><nametext>enif_raise_exception(ErlNifEnv* env, ERL_NIF_TERM reason)</nametext></name> <fsummary>Raise a NIF error exception.</fsummary> <desc> @@ -2848,7 +2896,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>void *</ret> + <name since="OTP 20.2"><ret>void *</ret> <nametext>enif_realloc(void* ptr, size_t size)</nametext></name> <fsummary>Reallocate dynamic memory.</fsummary> <desc> @@ -2862,7 +2910,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>int</ret> + <name since="OTP R13B04"><ret>int</ret> <nametext>enif_realloc_binary(ErlNifBinary* bin, size_t size)</nametext> </name> <fsummary>Change the size of a binary.</fsummary> @@ -2876,7 +2924,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>void</ret> + <name since=""><ret>void</ret> <nametext>enif_release_binary(ErlNifBinary* bin)</nametext></name> <fsummary>Release a binary.</fsummary> <desc> @@ -2887,7 +2935,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_release_resource(void* obj)</nametext></name> <fsummary>Release a resource object.</fsummary> <desc> @@ -2902,11 +2950,15 @@ enif_map_iterator_destroy(env, &iter);</code> References made by <seealso marker="#enif_make_resource"> <c>enif_make_resource</c></seealso> can only be removed by the garbage collector.</p> + <p>There are no guarantees exactly when the destructor of an + unreferenced resource is called. It could be called directly by + <c>enif_release_resource</c> but it could also be scheduled to be + called at a later time possibly by another thread.</p> </desc> </func> <func> - <name><ret>ErlNifRWLock *</ret> + <name since="OTP R13B04"><ret>ErlNifRWLock *</ret> <nametext>enif_rwlock_create(char *name)</nametext></name> <fsummary></fsummary> <desc> @@ -2916,7 +2968,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_rwlock_destroy(ErlNifRWLock *rwlck)</nametext></name> <fsummary></fsummary> <desc> @@ -2926,7 +2978,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>char*</ret> + <name since="OTP 21.0"><ret>char*</ret> <nametext>enif_rwlock_name(ErlNifRWLock* rwlck)</nametext></name> <fsummary></fsummary> <desc> @@ -2936,7 +2988,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_rwlock_rlock(ErlNifRWLock *rwlck)</nametext></name> <fsummary></fsummary> <desc> @@ -2946,7 +2998,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_rwlock_runlock(ErlNifRWLock *rwlck)</nametext></name> <fsummary></fsummary> <desc> @@ -2956,7 +3008,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_rwlock_rwlock(ErlNifRWLock *rwlck)</nametext></name> <fsummary></fsummary> <desc> @@ -2966,7 +3018,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_rwlock_rwunlock(ErlNifRWLock *rwlck)</nametext></name> <fsummary></fsummary> <desc> @@ -2976,7 +3028,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>int</ret> + <name since="OTP R13B04"><ret>int</ret> <nametext>enif_rwlock_tryrlock(ErlNifRWLock *rwlck)</nametext></name> <fsummary></fsummary> <desc> @@ -2986,7 +3038,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>int</ret> + <name since="OTP R13B04"><ret>int</ret> <nametext>enif_rwlock_tryrwlock(ErlNifRWLock *rwlck)</nametext></name> <fsummary></fsummary> <desc> @@ -2996,7 +3048,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>ERL_NIF_TERM</ret><nametext>enif_schedule_nif(ErlNifEnv* env, + <name since="OTP 17.3"><ret>ERL_NIF_TERM</ret><nametext>enif_schedule_nif(ErlNifEnv* env, const char* fun_name, int flags, ERL_NIF_TERM (*fp)(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]), int argc, const ERL_NIF_TERM argv[])</nametext></name> @@ -3041,7 +3093,7 @@ enif_map_iterator_destroy(env, &iter);</code> </func> <func> - <name><ret>int</ret> + <name since="OTP 20.0"><ret>int</ret> <nametext>enif_select(ErlNifEnv* env, ErlNifEvent event, enum ErlNifSelectFlags mode, void* obj, const ErlNifPid* pid, ERL_NIF_TERM ref)</nametext> </name> @@ -3056,13 +3108,21 @@ enif_map_iterator_destroy(env, &iter);</code> <p>Argument <c>mode</c> describes the type of events to wait for. It can be <c>ERL_NIF_SELECT_READ</c>, <c>ERL_NIF_SELECT_WRITE</c> or a bitwise OR combination to wait for both. It can also be <c>ERL_NIF_SELECT_STOP</c> - which is described further below. When a read or write event is triggered, + or <c>ERL_NIF_SELECT_CANCEL</c> which are described further + below. When a read or write event is triggered, a notification message like this is sent to the process identified by <c>pid</c>:</p> <code type="none">{select, Obj, Ref, ready_input | ready_output}</code> <p><c>ready_input</c> or <c>ready_output</c> indicates if the event object is ready for reading or writing.</p> - <p>Argument <c>pid</c> may be <c>NULL</c> to indicate the calling process.</p> + <note><p>For complete control over the message format use the newer functions + <seealso marker="#enif_select_read"><c>enif_select_read</c></seealso> or + <seealso marker="#enif_select_write"><c>enif_select_write</c></seealso> + introduced in erts-11.0 (OTP-22.0).</p> + </note> + <p>Argument <c>pid</c> may be <c>NULL</c> to indicate the calling + process. It must not be set as <seealso marker="#enif_set_pid_undefined"> + undefined</seealso>.</p> <p>Argument <c>obj</c> is a resource object obtained from <seealso marker="#enif_alloc_resource"><c>enif_alloc_resource</c></seealso>. The purpose of the resource objects is as a container of the event object @@ -3073,17 +3133,29 @@ enif_map_iterator_destroy(env, &iter);</code> or the atom <c>undefined</c>. It will be passed as <c>Ref</c> in the notifications. If a selective <c>receive</c> statement is used to wait for the notification then a reference created just before the <c>receive</c> will exploit a runtime - optimization that bypasses all earlier received messages in the queue.</p> + optimization that bypasses all earlier received messages in the + queue.</p> <p>The notifications are one-shot only. To receive further notifications of the same type (read or write), repeated calls to <c>enif_select</c> must be made after receiving each notification.</p> + <p><c>ERL_NIF_SELECT_CANCEL</c> can be used to cancel previously + selected events. It must be used in a bitwise OR combination with + <c>ERL_NIF_SELECT_READ</c> and/or <c>ERL_NIF_SELECT_WRITE</c> to + indicate which type of event to cancel. Arguments <c>pid</c> and + <c>ref</c> are ignored when <c>ERL_NIF_SELECT_CANCEL</c> is specified. + The return value will tell if the event was actualy cancelled or if a + notification may already have been sent.</p> <p>Use <c>ERL_NIF_SELECT_STOP</c> as <c>mode</c> in order to safely close an event object that has been passed to <c>enif_select</c>. The <seealso marker="#ErlNifResourceStop"><c>stop</c></seealso> callback of the resource <c>obj</c> will be called when it is safe to close the event object. This safe way of closing event objects must be used - even if all notifications have been received and no further calls to - <c>enif_select</c> have been made.</p> + even if all notifications have been received (or cancelled) and no + further calls to <c>enif_select</c> have been made. + <c>ERL_NIF_SELECT_STOP</c> will first cancel any selected events + before it calls or schedules the <c>stop</c> callback. Arguments + <c>pid</c> and <c>ref</c> are ignored when <c>ERL_NIF_SELECT_STOP</c> + is specified.</p> <p>The first call to <c>enif_select</c> for a specific OS <c>event</c> will establish a relation between the event object and the containing resource. All subsequent calls for an <c>event</c> must pass its containing resource as argument @@ -3105,7 +3177,15 @@ enif_map_iterator_destroy(env, &iter);</code> <item>The stop callback was called directly by <c>enif_select</c>.</item> <tag><c>ERL_NIF_SELECT_STOP_SCHEDULED</c></tag> <item>The stop callback was scheduled to run on some other thread - or later by this thread.</item> + or later by this thread.</item> + <tag><c>ERL_NIF_SELECT_READ_CANCELLED</c></tag> + <item>A read event was cancelled by <c>ERL_NIF_SELECT_CANCEL</c> or + <c>ERL_NIF_SELECT_STOP</c> and is guaranteed not to generate a + <c>ready_input</c> notification message.</item> + <tag><c>ERL_NIF_SELECT_WRITE_CANCELLED</c></tag> + <item>A write event was cancelled by <c>ERL_NIF_SELECT_CANCEL</c> or + <c>ERL_NIF_SELECT_STOP</c> and is guaranteed not to generate a + <c>ready_output</c> notification message.</item> </taglist> <p>Returns a negative value if the call failed where the following bits can be set:</p> <taglist> @@ -3131,11 +3211,48 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { } </code> </note> + <note><p>The mode flag <c>ERL_NIF_SELECT_CANCEL</c> and the return flags + <c>ERL_NIF_SELECT_READ_CANCELLED</c> and + <c>ERL_NIF_SELECT_WRITE_CANCELLED</c> were introduced in erts-11.0 + (OTP-22.0).</p> + </note> </desc> </func> <func> - <name><ret>ErlNifPid *</ret> + <name since="OTP 22.0"><ret>int</ret> + <nametext>enif_select_read(ErlNifEnv* env, ErlNifEvent event, void* obj, + const ErlNifPid* pid, ERL_NIF_TERM msg, ErlNifEnv* msg_env)</nametext> + </name> + <name since="OTP 22.0"><ret>int</ret> + <nametext>enif_select_write(ErlNifEnv* env, ErlNifEvent event, void* obj, + const ErlNifPid* pid, ERL_NIF_TERM msg, ErlNifEnv* msg_env)</nametext> + </name> + <fsummary>Manage subscription on IO event.</fsummary> + <desc> + <p>These are variants of <seealso marker="#enif_select">enif_select</seealso> + where you can supply your own message term <c>msg</c> that will be sent to + the process instead of the predefined tuple <c>{select,_,_,_}.</c></p> + <p>Argument <c>msg_env</c> must either be <c>NULL</c> or the environment of + <c>msg</c> allocated with <seealso marker="#enif_alloc_env"> + <c>enif_alloc_env</c></seealso>. If argument <c>msg_env</c> is + <c>NULL</c> the term <c>msg</c> will be copied, otherwise both + <c>msg</c> and <c>msg_env</c> will be invalidated by a successful call + to <c>enif_select_read</c> or <c>enif_select_write</c>. The environment + is then to either be freed with <seealso marker="#enif_free_env"> + <c>enif_free_env</c></seealso> or cleared for reuse with + <seealso marker="#enif_clear_env"><c>enif_clear_env</c></seealso>. An + unsuccessful call will leave <c>msg</c> and <c>msg_env</c> still valid.</p> + <p>Apart from the message format <c>enif_select_read</c> and + <c>enif_select_write</c> behaves exactly the same as <seealso + marker="#enif_select">enif_select</seealso> with argument <c>mode</c> as + either <c>ERL_NIF_SELECT_READ</c> or <c>ERL_NIF_SELECT_WRITE</c>. To + cancel or close events use <seealso marker="#enif_select">enif_select</seealso>.</p> + </desc> + </func> + + <func> + <name since="OTP R14B"><ret>ErlNifPid *</ret> <nametext>enif_self(ErlNifEnv* caller_env, ErlNifPid* pid)</nametext> </name> <fsummary>Get the pid of the calling process.</fsummary> @@ -3148,8 +3265,8 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>int</ret><nametext>enif_send(ErlNifEnv* caller_env, ErlNifPid* to_pid, - ErlNifEnv* msg_env, ERL_NIF_TERM msg)</nametext></name> + <name since="OTP R14B"><ret>int</ret><nametext>enif_send(ErlNifEnv* caller_env, + ErlNifPid* to_pid, ErlNifEnv* msg_env, ERL_NIF_TERM msg)</nametext></name> <fsummary>Send a message to a process.</fsummary> <desc> <p>Sends a message to a process.</p> @@ -3179,8 +3296,9 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { <c>msg</c>) is invalidated by a successful call to <c>enif_send</c>. The environment is to either be freed with <seealso marker="#enif_free_env"> - <c>enif_free_env</c></seealso> of cleared for reuse with - <seealso marker="#enif_clear_env"><c>enif_clear_env</c></seealso>.</p> + <c>enif_free_env</c></seealso> or cleared for reuse with + <seealso marker="#enif_clear_env"><c>enif_clear_env</c></seealso>. An + unsuccessful call will leave <c>msg</c> and <c>msg_env</c> still valid.</p> <p>If <c>msg_env</c> is set to <c>NULL</c>, the <c>msg</c> term is copied and the original term and its environment is still valid after the call.</p> @@ -3195,7 +3313,18 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>unsigned</ret> + <name since="OTP 22.0"><ret>void</ret> + <nametext>enif_set_pid_undefined(ErlNifPid* pid)</nametext></name> + <fsummary>Set pid as undefined.</fsummary> + <desc> + <p>Sets an <seealso marker="#ErlNifPid"><c>ErlNifPid</c></seealso> + variable as undefined. See <seealso marker="#enif_is_pid_undefined"> + <c>enif_is_pid_undefined</c></seealso>.</p> + </desc> + </func> + + <func> + <name since="OTP R13B04"><ret>unsigned</ret> <nametext>enif_sizeof_resource(void* obj)</nametext></name> <fsummary>Get the byte size of a resource object.</fsummary> <desc> @@ -3206,7 +3335,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>int</ret><nametext>enif_snprintf(char *str, size_t size, const + <name since="OTP 19.0"><ret>int</ret><nametext>enif_snprintf(char *str, size_t size, const char *format, ...)</nametext></name> <fsummary>Format strings and Erlang terms.</fsummary> <desc> @@ -3220,7 +3349,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>void</ret><nametext>enif_system_info(ErlNifSysInfo + <name since="OTP R13B04"><ret>void</ret><nametext>enif_system_info(ErlNifSysInfo *sys_info_ptr, size_t size)</nametext></name> <fsummary>Get information about the Erlang runtime system.</fsummary> <desc> @@ -3230,7 +3359,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>int</ret><nametext>enif_term_to_binary(ErlNifEnv *env, + <name since="OTP 19.0"><ret>int</ret><nametext>enif_term_to_binary(ErlNifEnv *env, ERL_NIF_TERM term, ErlNifBinary *bin)</nametext></name> <fsummary>Convert a term to the external format.</fsummary> <desc> @@ -3247,7 +3376,49 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>int</ret> + <name since="OTP 22.0"><ret>ErlNifTermType</ret> + <nametext>enif_term_type(ErlNifEnv *env, ERL_NIF_TERM term)</nametext> + </name> + <fsummary>Determine the type of a term.</fsummary> + <desc> + <p>Determines the type of the given term. The term must be an ordinary + Erlang term and not one of the special terms returned by + <seealso marker="#enif_raise_exception"> + <c>enif_raise_exception</c></seealso>, + <seealso marker="#enif_schedule_nif"> + <c>enif_schedule_nif</c></seealso>, or similar.</p> + <p>The following types are defined at the moment:</p> + <taglist> + <tag><c>ERL_NIF_TERM_TYPE_ATOM</c></tag> + <item/> + <tag><c>ERL_NIF_TERM_TYPE_BITSTRING</c></tag> + <item><p>A bitstring or binary</p></item> + <tag><c>ERL_NIF_TERM_TYPE_FLOAT</c></tag> + <item/> + <tag><c>ERL_NIF_TERM_TYPE_FUN</c></tag> + <item/> + <tag><c>ERL_NIF_TERM_TYPE_INTEGER</c></tag> + <item/> + <tag><c>ERL_NIF_TERM_TYPE_LIST</c></tag> + <item><p>A list, empty or not</p></item> + <tag><c>ERL_NIF_TERM_TYPE_MAP</c></tag> + <item/> + <tag><c>ERL_NIF_TERM_TYPE_PID</c></tag> + <item/> + <tag><c>ERL_NIF_TERM_TYPE_PORT</c></tag> + <item/> + <tag><c>ERL_NIF_TERM_TYPE_REFERENCE</c></tag> + <item/> + <tag><c>ERL_NIF_TERM_TYPE_TUPLE</c></tag> + <item/> + </taglist> + <p>Note that new types may be added in the future, so the caller must + be prepared to handle unknown types.</p> + </desc> + </func> + + <func> + <name since="OTP R13B04"><ret>int</ret> <nametext>enif_thread_create(char *name,ErlNifTid *tid,void * (*func)(void *),void *args,ErlNifThreadOpts *opts)</nametext></name> @@ -3259,7 +3430,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_thread_exit(void *resp)</nametext></name> <fsummary></fsummary> <desc> @@ -3269,7 +3440,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>int</ret> + <name since="OTP R13B04"><ret>int</ret> <nametext>enif_thread_join(ErlNifTid, void **respp)</nametext></name> <fsummary></fsummary> <desc> @@ -3279,7 +3450,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>char*</ret> + <name since="OTP 21.0"><ret>char*</ret> <nametext>enif_thread_name(ErlNifTid tid)</nametext></name> <fsummary>Thread name</fsummary> <desc> @@ -3289,7 +3460,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>ErlNifThreadOpts *</ret> + <name since="OTP R13B04"><ret>ErlNifThreadOpts *</ret> <nametext>enif_thread_opts_create(char *name)</nametext></name> <fsummary></fsummary> <desc> @@ -3299,7 +3470,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_thread_opts_destroy(ErlNifThreadOpts *opts)</nametext> </name> <fsummary></fsummary> @@ -3310,7 +3481,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>ErlNifTid</ret> + <name since="OTP R13B04"><ret>ErlNifTid</ret> <nametext>enif_thread_self(void)</nametext></name> <fsummary></fsummary> <desc> @@ -3320,7 +3491,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>int</ret> + <name since="OTP 19.0"><ret>int</ret> <nametext>enif_thread_type(void)</nametext></name> <fsummary>Determine type of current thread</fsummary> <desc> @@ -3342,7 +3513,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>ErlNifTime</ret> + <name since="OTP 18.3"><ret>ErlNifTime</ret> <nametext>enif_time_offset(ErlNifTimeUnit time_unit)</nametext></name> <fsummary>Get current time offset.</fsummary> <desc> @@ -3364,7 +3535,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>void *</ret> + <name since="OTP R13B04"><ret>void *</ret> <nametext>enif_tsd_get(ErlNifTSDKey key)</nametext></name> <fsummary></fsummary> <desc> @@ -3374,7 +3545,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>int</ret> + <name since="OTP R13B04"><ret>int</ret> <nametext>enif_tsd_key_create(char *name, ErlNifTSDKey *key)</nametext> </name> <fsummary></fsummary> @@ -3385,7 +3556,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_tsd_key_destroy(ErlNifTSDKey key)</nametext></name> <fsummary></fsummary> <desc> @@ -3395,7 +3566,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>void</ret> + <name since="OTP R13B04"><ret>void</ret> <nametext>enif_tsd_set(ErlNifTSDKey key, void *data)</nametext></name> <fsummary></fsummary> <desc> @@ -3405,7 +3576,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>int</ret> + <name since="OTP 21.0"><ret>int</ret> <nametext>enif_vfprintf(FILE *stream, const char *format, va_list ap) </nametext></name> <fsummary>Format strings and Erlang terms.</fsummary> @@ -3417,7 +3588,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>int</ret> + <name since="OTP 21.0"><ret>int</ret> <nametext>enif_vsnprintf(char *str, size_t size, const char *format, va_list ap) </nametext></name> <fsummary>Format strings and Erlang terms.</fsummary> @@ -3429,7 +3600,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>int</ret> + <name since="OTP 20.0"><ret>int</ret> <nametext>enif_whereis_pid(ErlNifEnv *env, ERL_NIF_TERM name, ErlNifPid *pid)</nametext></name> <fsummary>Looks up a process by its registered name.</fsummary> @@ -3457,7 +3628,7 @@ if (retval & ERL_NIF_SELECT_STOP_CALLED) { </func> <func> - <name><ret>int</ret> + <name since="OTP 20.0"><ret>int</ret> <nametext>enif_whereis_port(ErlNifEnv *env, ERL_NIF_TERM name, ErlNifPort *port)</nametext></name> <fsummary>Looks up a port by its registered name.</fsummary> |