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author | Guillaume Cottenceau <gc@mandriva.com> | 2001-05-14 14:17:54 +0000 |
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committer | Guillaume Cottenceau <gc@mandriva.com> | 2001-05-14 14:17:54 +0000 |
commit | 9097327dc1c667fc51b8e05cc7c0626fac96665d (patch) | |
tree | 1a67c4a8c6116747dfe0177e96928805dbba94b0 /mdk-stage1/dietlibc/libpthread/pthread_mutex_trylock.c | |
parent | f15aa3a552022743398a652165d76bf912c715e5 (diff) | |
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Initial revision
Diffstat (limited to 'mdk-stage1/dietlibc/libpthread/pthread_mutex_trylock.c')
-rw-r--r-- | mdk-stage1/dietlibc/libpthread/pthread_mutex_trylock.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libpthread/pthread_mutex_trylock.c b/mdk-stage1/dietlibc/libpthread/pthread_mutex_trylock.c new file mode 100644 index 000000000..fcf63f75e --- /dev/null +++ b/mdk-stage1/dietlibc/libpthread/pthread_mutex_trylock.c @@ -0,0 +1,36 @@ +#include <unistd.h> +#include <sched.h> +#include <errno.h> + +#include <pthread.h> +#include "thread_internal.h" + +/* will never return EINVAL ! */ + +int pthread_mutex_trylock(pthread_mutex_t *mutex) +{ + _pthread_descr this; + + __THREAD_INIT(); + + this = __thread_self(); + + if (this!=mutex->owner) { + /* wait for mutex to free */ + if (__pthread_trylock(&(mutex->lock))) { + (*(__errno_location()))=EBUSY; + return -1; + } + + mutex->owner=this; + } + else if (mutex->kind==PTHREAD_MUTEX_ERRORCHECK_NP) + { + (*(__errno_location()))=EDEADLK; + return -1; + } + + if (mutex->kind==PTHREAD_MUTEX_RECURSIVE_NP) ++(mutex->count); + + return 0; +} |