-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*/
/*
#ifndef __LUSTRE_UTILS_PLATFORM_H
#define __LUSTRE_UTILS_PLATFORM_H
-#ifdef __linux__
#ifdef HAVE_LIBREADLINE
#define READLINE_LIBRARY
#define l_cond_wait(c, s) pthread_cond_wait(c, s)
#endif
-#elif __APPLE__
-
-#ifdef HAVE_LIBREADLINE
-#define READLINE_LIBRARY
-#include <readline/readline.h>
-typedef VFunction rl_vintfunc_t;
-typedef VFunction rl_voidfunc_t;
-#endif /* HAVE_LIBREADLINE */
-
-#include <stdlib.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <sys/shm.h>
-#include <sys/semaphore.h>
-
-/*
- * POSIX compliant inter-process synchronization aren't supported well
- * in Darwin, pthread_mutex_t and pthread_cond_t can only work as
- * inter-thread synchronization, they wouldn't work even being put in
- * shared memory for multi-process. PTHREAD_PROCESS_SHARED is not
- * supported by Darwin also (pthread_mutexattr_setpshared() with the
- * PTHREAD_PROCESS_SHARED attribute will return EINVAL).
- *
- * The only inter-process sychronization mechanism can be used in Darwin
- * is POSIX NAMED semaphores and file lock, here we use NAMED semaphore
- * to implement mutex and condition.
- *
- * XXX Liang:
- * They are just proto-type now, more tests are needed.
- */
-#define L_LOCK_DEBUG (0)
-
-#define L_SEM_NAMESIZE 32
-
-typedef struct {
- sem_t *s_sem;
-#if L_LOCK_DEBUG
- char s_name[L_SEM_NAMESIZE];
-#endif
-} l_sem_t;
-
-typedef l_sem_t l_mutex_t;
-
-typedef struct {
- l_mutex_t c_guard;
- int c_count;
- l_sem_t c_waiter;
-} l_cond_t;
-
-static inline int l_sem_init(l_sem_t *sem, int val)
-{
- char *s_name;
-#if L_LOCK_DEBUG
- s_name = sem->s_name;
-#else
- char buf[L_SEM_NAMESIZE];
- s_name = buf;
-#endif
- /* get an unique name for named semaphore */
- snprintf(s_name, L_SEM_NAMESIZE, "%d-%p", (int)getpid(), sem);
- sem->s_sem = sem_open(s_name, O_CREAT, 0600, val);
- if ((int)sem->s_sem == SEM_FAILED) {
- fprintf(stderr, "lock %s creating fail: %d, %d!\n",
- s_name, (int)sem->s_sem, errno);
- return -1;
- } else {
-#if L_LOCK_DEBUG
- printf("open lock: %s\n", s_name);
-#endif
- }
- return 0;
-}
-
-static inline void l_sem_done(l_sem_t *sem)
-{
-#if L_LOCK_DEBUG
- printf("close lock: %s.\n", sem->s_name);
-#endif
- sem_close(sem->s_sem);
-}
-
-static inline void l_sem_down(l_sem_t *sem)
-{
-#if L_LOCK_DEBUG
- printf("sem down :%s\n", sem->s_name);
-#endif
- sem_wait(sem->s_sem);
-}
-
-static inline void l_sem_up(l_sem_t *sem)
-{
-#if L_LOCK_DEBUG
- printf("sem up :%s\n", sem->s_name);
-#endif
- sem_post(sem->s_sem);
-}
-
-static inline void l_mutex_init(l_mutex_t *mutex)
-{
- l_sem_init((l_sem_t *)mutex, 1);
-}
-
-static inline void l_mutex_init_locked(l_mutex_t *mutex)
-{
- l_sem_init((l_sem_t *)mutex, 0);
-}
-
-static inline void l_mutex_done(l_mutex_t *mutex)
-{
- l_sem_done((l_sem_t *)mutex);
-}
-
-static inline void l_mutex_lock(l_mutex_t *mutex)
-{
-#if L_LOCK_DEBUG
- printf("lock mutex :%s\n", mutex->s_name);
-#endif
- sem_wait(mutex->s_sem);
-}
-
-static inline void l_mutex_unlock(l_mutex_t *mutex)
-{
-#if L_LOCK_DEBUG
- printf("unlock mutex: %s\n", mutex->s_name);
-#endif
- sem_post(mutex->s_sem);
-}
-
-static inline void l_cond_init(l_cond_t *cond)
-{
- l_mutex_init(&cond->c_guard);
- l_sem_init(&cond->c_waiter, 0);
- cond->c_count = 0;
-}
-
-static inline void l_cond_done(l_cond_t *cond)
-{
- if (cond->c_count != 0)
- fprintf(stderr, "your waiter list is not empty: %d!\n", cond->c_count);
- l_mutex_done(&cond->c_guard);
- l_sem_done(&cond->c_waiter);
-}
-
-static inline void l_cond_wait(l_cond_t *cond, l_mutex_t *lock)
-{
- l_mutex_lock(&cond->c_guard);
- cond->c_count --;
- l_mutex_unlock(&cond->c_guard);
- l_mutex_unlock(lock);
- l_sem_down(&cond->c_waiter);
- l_mutex_lock(lock);
-}
-
-static inline void l_cond_broadcast(l_cond_t *cond)
-{
- l_mutex_lock(&cond->c_guard);
- while (cond->c_count < 0) {
- l_sem_up(&cond->c_waiter);
- cond->c_count ++;
- }
- l_mutex_unlock(&cond->c_guard);
-}
-
-#else /* other platform */
-
-#ifdef HAVE_LIBREADLINE
-#define READLINE_LIBRARY
-#include <readline/readline.h>
-#endif /* HAVE_LIBREADLINE */
-#include <errno.h>
-#include <string.h>
-#if HAVE_LIBPTHREAD
-#ifndef __WINNT__
-#include <sys/ipc.h>
-#include <sys/shm.h>
-#endif
-#include <pthread.h>
-
-typedef pthread_mutex_t l_mutex_t;
-typedef pthread_cond_t l_cond_t;
-#define l_mutex_init(s) pthread_mutex_init(s, NULL)
-#define l_mutex_lock(s) pthread_mutex_lock(s)
-#define l_mutex_unlock(s) pthread_mutex_unlock(s)
-#define l_cond_init(c) pthread_cond_init(c, NULL)
-#define l_cond_broadcast(c) pthread_cond_broadcast(c)
-#define l_cond_wait(c, s) pthread_cond_wait(c, s)
-#endif /* HAVE_LIBPTHREAD */
-
-#endif /* __linux__ */
#endif
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