semaphore.c File Reference

semaphore implementation More...

#include "common.h"
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <math.h>
#include "machine.h"
#include "bu.h"

Include dependency graph for semaphore.c:

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Defines
#define	BU_SEMAPHORE_MAGIC   0x62757365
Functions
void	bu_semaphore_init (unsigned int nsemaphores)
void	bu_semaphore_acquire (unsigned int i)
void	bu_semaphore_release (unsigned int i)

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Detailed Description

semaphore implementation

Machine-specific routines for parallel processing. Primarily for handling semaphores for critical sections.

The new paradigm: semaphores are referred to, not by a pointer, but by a small integer. This module is now responsible for obtaining whatever storage is needed to implement each semaphore.

Note that these routines can't use bu_log() for error logging, because bu_log() accquires semaphore #0 (BU_SEM_SYSCALL).

For code conversion hints, see "h/compat4.h"

Author:

Michael John Muuss

Source -

The U. S. Army Research Laboratory
Aberdeen Proving Ground, Maryland 21005-5068 USA

Definition in file semaphore.c.

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