diff options
Diffstat (limited to 'mdk-stage1/dietlibc/libpthread/pthread_mutex_lock.c')
-rw-r--r-- | mdk-stage1/dietlibc/libpthread/pthread_mutex_lock.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libpthread/pthread_mutex_lock.c b/mdk-stage1/dietlibc/libpthread/pthread_mutex_lock.c new file mode 100644 index 000000000..0c3ade9e8 --- /dev/null +++ b/mdk-stage1/dietlibc/libpthread/pthread_mutex_lock.c @@ -0,0 +1,33 @@ +#include <unistd.h> +#include <sched.h> +#include <errno.h> + +#include <pthread.h> +#include "thread_internal.h" + +/* will never return EINVAL ! */ + +int pthread_mutex_lock(pthread_mutex_t *mutex) +{ + _pthread_descr this; + + __THREAD_INIT(); + + this = __thread_self(); + + if (this!=mutex->owner) { + /* wait for mutex to free */ + __pthread_lock(&(mutex->lock)); + + 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; +} |