#include <nng/nng.h> #include <nng/supplemental/util/platform.h> typedef struct nng_mtx nng_mtx; int nng_mtx_alloc(nng_mtx **mtxp);
|This documentation is for the TIP (development tree) of NNG and may represent unreleased changes or functionality that is experimental, and is subject to change before release. The latest released version is v1.3.2. See the documentation for v1.3.2 for the most up-to-date information.|
nng_mtx_alloc - allocate mutex
nng_mtx_alloc() function allocates mutex and returns it in mtxp.
The mutex objects created by this function are suitable only for simple lock and unlock operations, and are not recursive. Every effort has been made to use light-weight underlying primitives when available.
Mutex (mutual exclusion) objects can be thought of as binary semaphores, where only a single thread of execution is permitted to acquire the semaphore.
Furthermore, a mutex can only be unlocked by the thread that locked it.
This function returns 0 on success, and non-zero otherwise.
Insufficient free memory exists.