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-rw-r--r--erts/doc/src/erl.xml9
-rw-r--r--erts/doc/src/erl_nif.xml230
2 files changed, 187 insertions, 52 deletions
diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml
index ea94a4e82b..98d05dc7de 100644
--- a/erts/doc/src/erl.xml
+++ b/erts/doc/src/erl.xml
@@ -1322,13 +1322,14 @@
<item>
<p>Verbose.</p>
</item>
- <tag><c><![CDATA[+W w | i]]></c></tag>
+ <tag><c><![CDATA[+W w | i | e]]></c></tag>
<item>
<p>Sets the mapping of warning messages for <c><![CDATA[error_logger]]></c>.
Messages sent to the error logger using one of the warning
- routines can be mapped either to errors (default), warnings
- (<c><![CDATA[+W w]]></c>), or info reports (<c><![CDATA[+W i]]></c>). The current
- mapping can be retrieved using
+ routines can be mapped either to errors (<c><![CDATA[+W e]]></c>),
+ warnings (<c><![CDATA[+W w]]></c>), or info reports
+ (<c><![CDATA[+W i]]></c>). The default is warnings.
+ The current mapping can be retrieved using
<c><![CDATA[error_logger:warning_map/0]]></c>. See
<seealso marker="kernel:error_logger#warning_map/0">error_logger(3)</seealso>
for further information.</p>
diff --git a/erts/doc/src/erl_nif.xml b/erts/doc/src/erl_nif.xml
index 4bad8b253c..f64381c99d 100644
--- a/erts/doc/src/erl_nif.xml
+++ b/erts/doc/src/erl_nif.xml
@@ -461,8 +461,9 @@ ok
independent environment with all its terms is valid until you explicitly
invalidates it with <seealso marker="#enif_free_env">enif_free_env</seealso>
or <c>enif_send</c>.</p>
- <p>All elements of a list/tuple must belong to the same environment as the
- list/tuple itself. Terms can be copied between environments with
+ <p>All contained terms of a list/tuple/map must belong to the same
+ environment as the list/tuple/map itself. Terms can be copied between
+ environments with
<seealso marker="#enif_make_copy">enif_make_copy</seealso>.</p>
</item>
<tag><marker id="ErlNifFunc"/>ErlNifFunc</tag>
@@ -564,11 +565,11 @@ typedef enum {
<funcs>
<func><name><ret>void *</ret><nametext>enif_alloc(size_t size)</nametext></name>
- <fsummary>Allocate dynamic memory.</fsummary>
+ <fsummary>Allocate dynamic memory</fsummary>
<desc><p>Allocate memory of <c>size</c> bytes. Return NULL if allocation failed.</p></desc>
</func>
<func><name><ret>int</ret><nametext>enif_alloc_binary(size_t size, ErlNifBinary* bin)</nametext></name>
- <fsummary>Create a new binary.</fsummary>
+ <fsummary>Create a new binary</fsummary>
<desc><p>Allocate a new binary of size <c>size</c>
bytes. Initialize the structure pointed to by <c>bin</c> to
refer to the allocated binary. The binary must either be released by
@@ -595,7 +596,7 @@ typedef enum {
<desc><p>Allocate a memory managed resource object of type <c>type</c> and size <c>size</c> bytes.</p></desc>
</func>
<func><name><ret>void</ret><nametext>enif_clear_env(ErlNifEnv* env)</nametext></name>
- <fsummary>Clear an environment for reuse.</fsummary>
+ <fsummary>Clear an environment for reuse</fsummary>
<desc><p>Free all terms in an environment and clear it for reuse. The environment must
have been allocated with <seealso marker="#enif_alloc_env">enif_alloc_env</seealso>.
</p></desc>
@@ -683,14 +684,14 @@ typedef enum {
<c>size-1</c>.</p></desc>
</func>
<func><name><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>
+ <fsummary>Get the length of atom <c>term</c></fsummary>
<desc><p>Set <c>*len</c> to the length (number of bytes excluding
terminating null character) of the atom <c>term</c> with encoding
<c>encode</c>. Return true on success or false if <c>term</c> is not an
atom.</p></desc>
</func>
<func><name><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>
+ <fsummary>Read a floating-point number term</fsummary>
<desc><p>Set <c>*dp</c> to the floating point value of
<c>term</c>. Return true on success or false if <c>term</c> is not a float.</p></desc>
</func>
@@ -719,17 +720,28 @@ typedef enum {
non-empty list.</p></desc>
</func>
<func><name><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>
+ <fsummary>Get the length of list <c>term</c></fsummary>
<desc><p>Set <c>*len</c> to the length of list <c>term</c> and return true,
or return false if <c>term</c> is not a list.</p></desc>
</func>
<func><name><ret>int</ret><nametext>enif_get_long(ErlNifEnv* env, ERL_NIF_TERM term, long int* ip)</nametext></name>
- <fsummary>Read an long integer term.</fsummary>
+ <fsummary>Read an long integer term</fsummary>
<desc><p>Set <c>*ip</c> to the long integer value of <c>term</c> and
return true, or return false if <c>term</c> is not an integer or is
outside the bounds of type <c>long int</c>.</p></desc>
</func>
- <func><name><ret>int</ret><nametext>enif_get_resource(ErlNifEnv* env, ERL_NIF_TERM term, ErlNifResourceType* type, void** objp)</nametext></name>
+ <func><name><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><p>Set <c>*size</c> to the number of key-value pairs in the map <c>term</c> and
+ return true, or return false if <c>term</c> is not a map.</p></desc>
+ </func>
+ <func><name><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>
+ <desc><p>Set <c>*value</c> to the value associated with <c>key</c> in the
+ map <c>map</c> and return true. Return false if <c>map</c> is not a map
+ or if <c>map</c> does not contain <c>key</c>.</p></desc>
+ </func>
+ <func><name><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>
<desc><p>Set <c>*objp</c> to point to the resource object referred to by <c>term</c>.</p>
<p>Return true on success or false if <c>term</c> is not a handle to a resource object
@@ -738,7 +750,7 @@ typedef enum {
<func><name><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>
+ <fsummary>Get a C-string from a list</fsummary>
<desc><p>Write a null-terminated string, in the buffer pointed to by
<c>buf</c> with size <c>size</c>, consisting of the characters
in the string <c>list</c>. The characters are written using encoding
@@ -751,7 +763,7 @@ typedef enum {
<c>size</c> is less than 1.</p></desc>
</func>
<func><name><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>
+ <fsummary>Inspect the elements of a tuple</fsummary>
<desc><p>If <c>term</c> is a tuple, set <c>*array</c> to point
to an array containing the elements of the tuple and set
<c>*arity</c> to the number of elements. Note that the array
@@ -761,28 +773,35 @@ typedef enum {
tuple.</p></desc>
</func>
<func><name><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>
+ <fsummary>Read an unsigned integer term</fsummary>
<desc><p>Set <c>*ip</c> to the unsigned integer value of <c>term</c> and
return true, or return false if <c>term</c> is not an unsigned integer or
is outside the bounds of type <c>unsigned int</c>.</p></desc>
</func>
<func><name><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>
+ <fsummary>Read an unsigned 64-bit integer term</fsummary>
<desc><p>Set <c>*ip</c> to the unsigned integer value of <c>term</c> and
return true, or return false if <c>term</c> is not an unsigned integer or
is outside the bounds of an unsigned 64-bit integer.</p></desc>
</func>
<func><name><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>
+ <fsummary>Read an unsigned integer term</fsummary>
<desc><p>Set <c>*ip</c> to the unsigned long integer value of <c>term</c>
and return true, or return false if <c>term</c> is not an unsigned integer or is
outside the bounds of type <c>unsigned long</c>.</p></desc>
</func>
- <func><name><ret>int</ret><nametext>enif_has_pending_exception(ErlNifEnv* env)</nametext></name>
- <fsummary>Check if an exception has been raised.</fsummary>
+ <func><name><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><p>Return true if a pending exception is associated
- with the environment <c>env</c>. The only possible exception is currently
- <c>badarg</c> (see <seealso marker="#enif_make_badarg">enif_make_badarg</seealso>).</p></desc>
+ with the environment <c>env</c>. If <c>reason</c> is a null pointer, ignore it.
+ Otherwise, if there's a pending exception associated with <c>env</c>, set the ERL_NIF_TERM
+ to which <c>reason</c> points to the value of the exception's term. For example, if
+ <seealso marker="#enif_make_badarg">enif_make_badarg</seealso> is called to set a
+ pending <c>badarg</c> exception, a subsequent call to <c>enif_has_pending_exception(env, &amp;reason)</c>
+ will set <c>reason</c> to the atom <c>badarg</c>, then return true.</p>
+ <p>See also: <seealso marker="#enif_make_badarg">enif_make_badarg</seealso>
+ and <seealso marker="#enif_raise_exception">enif_raise_exception</seealso>.</p>
+ </desc>
</func>
<func><name><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>
@@ -817,6 +836,10 @@ typedef enum {
<fsummary>Determine if a term is an exception</fsummary>
<desc><p>Return true if <c>term</c> is an exception.</p></desc>
</func>
+ <func><name><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><p>Return true if <c>term</c> is a map, false otherwise.</p></desc>
+ </func>
<func><name><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><p>Return true if <c>term</c> is a number.</p></desc>
@@ -890,18 +913,19 @@ typedef enum {
</p></desc>
</func>
<func><name><ret>ERL_NIF_TERM</ret><nametext>enif_make_badarg(ErlNifEnv* env)</nametext></name>
- <fsummary>Make a badarg exception.</fsummary>
+ <fsummary>Make a badarg exception</fsummary>
<desc><p>Make a badarg exception to be returned from a NIF, and associate
it with the environment <c>env</c>. Once a NIF or any function
it calls invokes <c>enif_make_badarg</c>, the runtime ensures that a
<c>badarg</c> exception is raised when the NIF returns, even if the NIF
attempts to return a non-exception term instead.
- The return value from <c>enif_make_badarg</c> may only be used as
- return value from the NIF that invoked it (direct or indirectly)
+ The return value from <c>enif_make_badarg</c> may be used only as the
+ return value from the NIF that invoked it (directly or indirectly)
or be passed to
<seealso marker="#enif_is_exception">enif_is_exception</seealso>, but
not to any other NIF API function.</p>
- <p>See also: <seealso marker="#enif_has_pending_exception">enif_has_pending_exception</seealso>.
+ <p>See also: <seealso marker="#enif_has_pending_exception">enif_has_pending_exception</seealso>
+ and <seealso marker="#enif_raise_exception">enif_raise_exception</seealso>
</p>
<note><p>In earlier versions (older than erts-7.0, OTP 18) the return value
from <c>enif_make_badarg</c> had to be returned from the NIF. This
@@ -909,14 +933,14 @@ typedef enum {
if <c>enif_make_badarg</c> has been invoked.</p></note></desc>
</func>
<func><name><ret>ERL_NIF_TERM</ret><nametext>enif_make_binary(ErlNifEnv* env, ErlNifBinary* bin)</nametext></name>
- <fsummary>Make a binary term.</fsummary>
+ <fsummary>Make a binary term</fsummary>
<desc><p>Make a binary term from <c>bin</c>. Any ownership of
the binary data will be transferred to the created term and
<c>bin</c> should be considered read-only for the rest of the NIF
call and then as released.</p></desc>
</func>
<func><name><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>
+ <fsummary>Make a copy of a term</fsummary>
<desc><p>Make a copy of term <c>src_term</c>. The copy will be created in
environment <c>dst_env</c>. The source term may be located in any
environment.</p></desc>
@@ -957,7 +981,7 @@ typedef enum {
<desc><p>Create an integer term from a signed 64-bit integer.</p></desc>
</func>
<func><name><ret>ERL_NIF_TERM</ret><nametext>enif_make_list(ErlNifEnv* env, unsigned cnt, ...)</nametext></name>
- <fsummary>Create a list term.</fsummary>
+ <fsummary>Create a list term</fsummary>
<desc><p>Create an ordinary list term of length <c>cnt</c>. Expects
<c>cnt</c> number of arguments (after <c>cnt</c>) of type ERL_NIF_TERM as the
elements of the list. An empty list is returned if <c>cnt</c> is 0.</p></desc>
@@ -971,28 +995,21 @@ typedef enum {
<name><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, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e8)</nametext></name>
<name><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>
+ <fsummary>Create a list term</fsummary>
<desc><p>Create an ordinary list term with length indicated by the
function name. Prefer these functions (macros) over the variadic
<c>enif_make_list</c> to get a compile time error if the number of
arguments does not match.</p></desc>
</func>
<func><name><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>
+ <fsummary>Create a list cell</fsummary>
<desc><p>Create a list cell <c>[head | tail]</c>.</p></desc>
</func>
<func><name><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>
+ <fsummary>Create a list term from an array</fsummary>
<desc><p>Create an ordinary list containing the elements of array <c>arr</c>
of length <c>cnt</c>. An empty list is returned if <c>cnt</c> is 0.</p></desc>
</func>
- <func><name><ret>int</ret><nametext>enif_make_reverse_list(ErlNifEnv* env, ERL_NIF_TERM term, ERL_NIF_TERM *list)</nametext></name>
- <fsummary>Create the reverse list of the list <c>term</c>.</fsummary>
- <desc><p>Set <c>*list</c> to the reverse list of the list <c>term</c> and return true,
- or return false if <c>term</c> is not a list. This function should only be used on
- short lists as a copy will be created of the list which will not be released until after the
- nif returns.</p></desc>
- </func>
<func><name><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><p>Create an integer term from a <c>long int</c>.</p></desc>
@@ -1007,12 +1024,42 @@ typedef enum {
reallocated.</p><p>Return a pointer to the raw binary data and set
<c>*termp</c> to the binary term.</p></desc>
</func>
+ <func><name><ret>ERL_NIF_TERM</ret><nametext>enif_make_new_map(ErlNifEnv* env)</nametext></name>
+ <fsummary>Make an empty map term</fsummary>
+ <desc><p>Make an empty map term.</p></desc>
+ </func>
+ <func><name><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>
+ <desc><p>Make a copy of map <c>map_in</c> and insert <c>key</c> with
+ <c>value</c>. If <c>key</c> already exists in <c>map_in</c>, the old
+ associated value is replaced by <c>value</c>. If successful set
+ <c>*map_out</c> to the new map and return true. Return false if
+ <c>map_in</c> is not a map.</p>
+ <p>The <c>map_in</c> term must belong to the environment <c>env</c>.</p></desc>
+ </func>
+ <func><name><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>
+ <desc><p>Make a copy of map <c>map_in</c> and replace the old associated
+ value for <c>key</c> with <c>new_value</c>. If successful set
+ <c>*map_out</c> to the new map and return true. Return false if
+ <c>map_in</c> is not a map or if it does no contain <c>key</c>.</p>
+ <p>The <c>map_in</c> term must belong to the environment <c>env</c>.</p></desc>
+ </func>
+ <func><name><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>
+ <desc><p>If map <c>map_in</c> contains <c>key</c>, make a copy of
+ <c>map_in</c> in <c>*map_out</c> and remove <c>key</c> and associated
+ value. If map <c>map_in</c> does not contain <c>key</c>, set
+ <c>*map_out</c> to <c>map_in</c>. Return true for success or false if
+ <c>map_in</c> is not a map.</p>
+ <p>The <c>map_in</c> term must belong to the environment <c>env</c>.</p></desc>
+ </func>
<func><name><ret>ERL_NIF_TERM</ret><nametext>enif_make_pid(ErlNifEnv* env, const ErlNifPid* pid)</nametext></name>
<fsummary>Make a pid term</fsummary>
<desc><p>Make a pid term from <c>*pid</c>.</p></desc>
</func>
<func><name><ret>ERL_NIF_TERM</ret><nametext>enif_make_ref(ErlNifEnv* env)</nametext></name>
- <fsummary>Create a reference.</fsummary>
+ <fsummary>Create a reference</fsummary>
<desc><p>Create a reference like <seealso marker="erlang#make_ref-0">erlang:make_ref/0</seealso>.</p></desc>
</func>
<func><name><ret>ERL_NIF_TERM</ret><nametext>enif_make_resource(ErlNifEnv* env, void* obj)</nametext></name>
@@ -1050,20 +1097,28 @@ typedef enum {
<seealso marker="#enif_release_resource">enif_release_resource</seealso>.</p>
</desc>
</func>
+ <func><name><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>
+ <desc><p>Set <c>*list_out</c> to the reverse list of the list <c>list_in</c> and return true,
+ or return false if <c>list_in</c> is not a list. This function should only be used on
+ short lists as a copy will be created of the list which will not be released until after the
+ nif returns.</p>
+ <p>The <c>list_in</c> term must belong to the environment <c>env</c>.</p></desc>
+ </func>
<func><name><ret>ERL_NIF_TERM</ret><nametext>enif_make_string(ErlNifEnv* env, const char* string, ErlNifCharEncoding encoding)</nametext></name>
- <fsummary>Create a string.</fsummary>
+ <fsummary>Create a string</fsummary>
<desc><p>Create a list containing the characters of the
null-terminated string <c>string</c> with encoding <seealso marker="#ErlNifCharEncoding">encoding</seealso>.</p></desc>
</func>
<func><name><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>
+ <fsummary>Create a string</fsummary>
<desc><p>Create a list containing the characters of the string <c>string</c> with
length <c>len</c> and encoding <seealso marker="#ErlNifCharEncoding">encoding</seealso>.
Null-characters are treated as any other characters.</p></desc>
</func>
<func><name><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>
+ <fsummary>Make a subbinary term</fsummary>
<desc><p>Make a subbinary of binary <c>bin_term</c>, starting at
zero-based position <c>pos</c> with a length of <c>size</c> bytes.
<c>bin_term</c> must be a binary or bitstring and
@@ -1071,7 +1126,7 @@ typedef enum {
bytes in <c>bin_term</c>.</p></desc>
</func>
<func><name><ret>ERL_NIF_TERM</ret><nametext>enif_make_tuple(ErlNifEnv* env, unsigned cnt, ...)</nametext></name>
- <fsummary>Create a tuple term.</fsummary>
+ <fsummary>Create a tuple term</fsummary>
<desc><p>Create a tuple term of arity <c>cnt</c>. Expects
<c>cnt</c> number of arguments (after <c>cnt</c>) of type ERL_NIF_TERM as the
elements of the tuple.</p></desc>
@@ -1085,14 +1140,14 @@ typedef enum {
<name><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, ERL_NIF_TERM e1, ..., ERL_NIF_TERM e8)</nametext></name>
<name><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>
+ <fsummary>Create a tuple term</fsummary>
<desc><p>Create a tuple term with length indicated by the
function name. Prefer these functions (macros) over the variadic
<c>enif_make_tuple</c> to get a compile time error if the number of
arguments does not match.</p></desc>
</func>
<func><name><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>
+ <fsummary>Create a tuple term from an array</fsummary>
<desc><p>Create a tuple containing the elements of array <c>arr</c>
of length <c>cnt</c>.</p></desc>
</func>
@@ -1108,6 +1163,72 @@ typedef enum {
<fsummary>Create an integer term from an unsigned long int</fsummary>
<desc><p>Create an integer term from an <c>unsigned long int</c>.</p></desc>
</func>
+ <func><name><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>
+ <desc><p>Create an iterator for the map <c>map</c> by initializing the
+ structure pointed to by <c>iter</c>. The <c>entry</c> argument determines
+ the start position of the iterator: <c>ERL_NIF_MAP_ITERATOR_FIRST</c> or
+ <c>ERL_NIF_MAP_ITERATOR_LAST</c>. Return true on success or false if
+ <c>map</c> is not a map.</p>
+ <p>A map iterator is only useful during the lifetime of the environment
+ <c>env</c> that the <c>map</c> belongs to. The iterator must be destroyed by
+ calling <seealso marker="#enif_map_iterator_destroy">
+ enif_map_iterator_destroy</seealso>.</p>
+ <code type="none">
+ERL_NIF_TERM key, value;
+ErlNifMapIterator iter;
+enif_map_iterator_create(env, my_map, ERL_NIF_MAP_ITERATOR_FIRST);
+
+while (enif_map_iterator_get_pair(env, &amp;iter, &amp;key, &amp;value)) {
+ do_something(key,value);
+ enif_map_iterator_next(env, &amp;iter);
+}
+enif_map_iterator_destroy(env, &amp;iter);
+ </code>
+ <note><p>The key-value pairs of a map have no defined iteration
+ order. The only guarantee is that the iteration order of a single map
+ instance is preserved during the lifetime of the environment that the map
+ belongs to.</p>
+ </note>
+ </desc>
+ </func>
+ <func><name><ret>void</ret><nametext>enif_map_iterator_destroy(ErlNifEnv *env, ErlNifMapIterator *iter)</nametext></name>
+ <fsummary>Destroy a map iterator</fsummary>
+ <desc><p>Destroy a map iterator created by
+ <seealso marker="#enif_map_iterator_create">enif_map_iterator_create</seealso>.
+ </p></desc>
+ </func>
+ <func><name><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>
+ <desc><p>Get key and value terms at current map iterator position.
+ On success set <c>*key</c> and <c>*value</c> and return true.
+ Return false if the iterator is positioned at head (before first entry)
+ or tail (beyond last entry).</p></desc>
+ </func>
+ <func><name><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><p>Return true if map iterator <c>iter</c> is positioned
+ before first entry.</p></desc>
+ </func>
+ <func><name><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><p>Return true if map iterator <c>iter</c> is positioned
+ after last entry.</p></desc>
+ </func>
+ <func><name><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><p>Increment map iterator to point to next key-value entry.
+ Return true if the iterator is now positioned at a valid key-value entry,
+ or false if the iterator is positioned at the tail (beyond the last
+ entry).</p></desc>
+ </func>
+ <func><name><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><p>Decrement map iterator to point to previous key-value entry.
+ Return true if the iterator is now positioned at a valid key-value entry,
+ or false if the iterator is positioned at the head (before the first
+ entry).</p></desc>
+ </func>
<func><name><ret>ErlNifMutex *</ret><nametext>enif_mutex_create(char *name)</nametext></name>
<fsummary></fsummary>
<desc><p>Same as <seealso marker="erl_driver#erl_drv_mutex_create">erl_drv_mutex_create</seealso>.
@@ -1168,19 +1289,32 @@ typedef enum {
<c>reload</c> or <c>upgrade</c>.</p>
<p>Was previously named <c>enif_get_data</c>.</p></desc>
</func>
+ <func><name><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><p>Create an error exception with the term <c>reason</c> to be returned from a NIF,
+ and associate it with the environment <c>env</c>. Once a NIF or any function it calls
+ invokes <c>enif_raise_exception</c>, the runtime ensures that the exception it creates
+ is raised when the NIF returns, even if the NIF attempts to return a non-exception
+ term instead. The return value from <c>enif_raise_exception</c> may be used only as
+ the return value from the NIF that invoked it (directly or indirectly) or be passed
+ to <seealso marker="#enif_is_exception">enif_is_exception</seealso>, but
+ not to any other NIF API function.</p>
+ <p>See also: <seealso marker="#enif_has_pending_exception">enif_has_pending_exception</seealso>
+ and <seealso marker="#enif_make_badarg">enif_make_badarg</seealso>.</p></desc>
+ </func>
<func><name><ret>int</ret><nametext>enif_realloc_binary(ErlNifBinary* bin, size_t size)</nametext></name>
- <fsummary>Change the size of a binary.</fsummary>
+ <fsummary>Change the size of a binary</fsummary>
<desc><p>Change the size of a binary <c>bin</c>. The source binary
may be read-only, in which case it will be left untouched and
a mutable copy is allocated and assigned to <c>*bin</c>. Return true on success,
false if memory allocation failed.</p></desc>
</func>
<func><name><ret>void</ret><nametext>enif_release_binary(ErlNifBinary* bin)</nametext></name>
- <fsummary>Release a binary.</fsummary>
+ <fsummary>Release a binary</fsummary>
<desc><p>Release a binary obtained from <c>enif_alloc_binary</c>.</p></desc>
</func>
<func><name><ret>void</ret><nametext>enif_release_resource(void* obj)</nametext></name>
- <fsummary>Release a resource object.</fsummary>
+ <fsummary>Release a resource object</fsummary>
<desc><p>Remove a reference to resource object <c>obj</c>obtained from
<seealso marker="#enif_alloc_resource">enif_alloc_resource</seealso>.
The resource object will be destructed when the last reference is removed.
@@ -1256,12 +1390,12 @@ typedef enum {
</desc>
</func>
<func><name><ret>ErlNifPid *</ret><nametext>enif_self(ErlNifEnv* caller_env, ErlNifPid* pid)</nametext></name>
- <fsummary>Get the pid of the calling process.</fsummary>
+ <fsummary>Get the pid of the calling process</fsummary>
<desc><p>Initialize the pid variable <c>*pid</c> to represent the
calling process. Return <c>pid</c>.</p></desc>
</func>
<func><name><ret>int</ret><nametext>enif_send(ErlNifEnv* env, ErlNifPid* to_pid, ErlNifEnv* msg_env, ERL_NIF_TERM msg)</nametext></name>
- <fsummary>Send a message to a process.</fsummary>
+ <fsummary>Send a message to a process</fsummary>
<desc><p>Send a message to a process.</p>
<taglist>
<tag><c>env</c></tag>
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-28 18:22:50 +0000