pthreads/pthread_mutex_lock.3

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  30 .Dd July 30, 1998
  31 .Dt PTHREAD_MUTEX_LOCK 3
  32 .Os
  33 .Sh NAME
  34 .Nm pthread_mutex_lock
  35 .Nd lock a mutex
  36 .Sh SYNOPSIS
  37 .Fd #include <pthread.h>
  38 .Ft int
  39 .Fn pthread_mutex_lock "pthread_mutex_t *mutex"
  40 .Sh DESCRIPTION
  41 The
  42 .Fn pthread_mutex_lock
  43 function locks
  44 .Fa mutex .
  45 If the mutex is already locked, the calling thread will block until the
  46 mutex becomes available.
  47 .Sh RETURN VALUES
  48 If successful,
  49 .Fn pthread_mutex_lock
  50 will return zero, otherwise an error number will be returned to
  51 indicate the error.
  52 .Sh ERRORS
  53 .Fn pthread_mutex_lock
  54 will fail if:
  55 .Bl -tag -width Er
  56 .It Bq Er EINVAL
  57 The value specified by
  58 .Fa mutex
  59 is invalid.
  60 .It Bq Er EDEADLK
  61 A deadlock would occur if the thread blocked waiting for
  62 .Fa mutex .
  63 .El
  64 .Sh SEE ALSO
  65 .Xr pthread_mutex_destroy 3 ,
  66 .Xr pthread_mutex_init 3 ,
  67 .Xr pthread_mutex_trylock 3 ,
  68 .Xr pthread_mutex_unlock 3
  69 .Sh STANDARDS
  70 .Fn pthread_mutex_lock
  71 conforms to
  72 .St -p1003.1-96 .