source: azure_iot_hub/trunk/musl-1.1.18/src/thread/mtx_lock.c@ 388

Last change on this file since 388 was 388, checked in by coas-nagasima, 5 years ago

Azure IoT Hub Device C SDK を使ったサンプルの追加
  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
  • Property svn:mime-type set to text/x-csrc
File size: 351 bytes
Line 
1#include "pthread_impl.h"
2#include <threads.h>
3
4int mtx_lock(mtx_t *m)
5{
6 if (m->_m_type == PTHREAD_MUTEX_NORMAL && !a_cas(&m->_m_lock, 0, EBUSY))
7 return thrd_success;
8 /* Calling mtx_timedlock with a null pointer is an extension.
9 * It is convenient, here to avoid duplication of the logic
10 * for return values. */
11 return mtx_timedlock(m, 0);
12}
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