Back to index

glibc  2.9
Functions
pspinlock.c File Reference
#include <errno.h>
#include <pthread.h>
#include "internals.h"

Go to the source code of this file.

Functions

int __pthread_spin_lock (pthread_spinlock_t *lock)
 weak_alias (__pthread_spin_lock, pthread_spin_lock)
 weak_alias (__pthread_spin_trylock, pthread_spin_trylock)
 weak_alias (__pthread_spin_unlock, pthread_spin_unlock)
 weak_alias (__pthread_spin_init, pthread_spin_init)

Function Documentation

int __pthread_spin_lock ( pthread_spinlock_t *  lock)

Definition at line 25 of file pspinlock.c.

{
  while (! __compare_and_swap ((long int *)lock, 0, 1))
    ;
  return 0;
}

Here is the call graph for this function:

Definition at line 31 of file pspinlock.c.

{
  return __compare_and_swap ((long int *)lock, 0, 1) ? 0 : EBUSY;
}

Here is the call graph for this function:

Definition at line 39 of file pspinlock.c.

{
  MEMORY_BARRIER ();
  *lock = 0;
  return 0;
}

Definition at line 49 of file pspinlock.c.

{
  /* We can ignore the `pshared' parameter.  Since we are busy-waiting
     all processes which can access the memory location `lock' points
     to can use the spinlock.  */
  *lock = 0;
  return 0;
}

Definition at line 61 of file pspinlock.c.

{
  /* Nothing to do.  */
  return 0;
}