diff options
Diffstat (limited to 'erts/doc/src/erl_nif.xml')
| -rw-r--r-- | erts/doc/src/erl_nif.xml | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/erts/doc/src/erl_nif.xml b/erts/doc/src/erl_nif.xml index 18b340591c..5ec844e2ad 100644 --- a/erts/doc/src/erl_nif.xml +++ b/erts/doc/src/erl_nif.xml @@ -163,6 +163,8 @@ ok <seealso marker="#enif_make_binary">enif_make_binary</seealso>. But it does not have to happen in the same NIF call. Read-only binaries do not have to be released.</p> + <p><seealso marker="#enif_make_new_binary">enif_make_new_binary</seealso> + can be used as a shortcut to allocate and return a binary in the same NIF call.</p> <p>Binaries are sequences of whole bytes. Bitstrings with an arbitrary bit length have no support yet.</p> </item> @@ -660,6 +662,16 @@ typedef enum { <fsummary>Create an integer term from a long int</fsummary> <desc><p>Create an integer term from a <c>long int</c>.</p></desc> </func> + <func><name><ret>unsigned char*</ret><nametext>enif_make_new_binary(ErlNifEnv* env, unsigned size, ERL_NIF_TERM* termp)</nametext></name> + <fsummary>Allocate and create a new binary term</fsummary> + <desc><p>Allocate a binary of size <c>size</c> bytes and create an owning + term. The binary data is mutable until the calling NIF returns. This is a + quick way to create a new binary without having to use + <seealso marker="#ErlNifBinary">ErlNifBinary</seealso>. The drawbacks are + that the binary can not be kept between NIF calls and it can not be + 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_ref(ErlNifEnv* env)</nametext></name> <fsummary>Create a reference.</fsummary> <desc><p>Create a reference like <seealso marker="erlang#make_ref-0">erlang:make_ref/0</seealso>.</p></desc> |