--- /dev/null
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr.h"
+#include "apr_strings.h"
+#include "apr_arch_proc_mutex.h"
+#include "apr_arch_file_io.h" /* for apr_mkstemp() */
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_destroy(apr_proc_mutex_t *mutex)
+{
+ return apr_pool_cleanup_run(mutex->pool, mutex, apr_proc_mutex_cleanup);
+}
+
+static apr_status_t proc_mutex_no_tryacquire(apr_proc_mutex_t *new_mutex)
+{
+ return APR_ENOTIMPL;
+}
+
+#if APR_HAS_POSIXSEM_SERIALIZE
+
+#ifndef SEM_FAILED
+#define SEM_FAILED (-1)
+#endif
+
+static void proc_mutex_posix_setup(void)
+{
+}
+
+static apr_status_t proc_mutex_posix_cleanup(void *mutex_)
+{
+ apr_proc_mutex_t *mutex=mutex_;
+ apr_status_t stat = APR_SUCCESS;
+
+ if (mutex->interproc->filedes != -1) {
+ if (sem_close((sem_t *)mutex->interproc->filedes) < 0) {
+ stat = errno;
+ }
+ }
+ return stat;
+}
+
+static apr_status_t proc_mutex_posix_create(apr_proc_mutex_t *new_mutex,
+ const char *fname)
+{
+ sem_t *psem;
+ apr_status_t stat;
+ char semname[31];
+ apr_time_t now;
+ unsigned long sec;
+ unsigned long usec;
+
+ new_mutex->interproc = apr_palloc(new_mutex->pool,
+ sizeof(*new_mutex->interproc));
+ new_mutex->interproc->filedes = -1;
+ /*
+ * This bogusness is to follow what appears to be the
+ * lowest common denominator in Posix semaphore naming:
+ * - start with '/'
+ * - be at most 14 chars
+ * - be unique and not match anything on the filesystem
+ *
+ * Because of this, we ignore fname, and try our
+ * own naming system. We tuck the name away, since it might
+ * be useful for debugging. to make this as robust as possible,
+ * we initially try something larger (and hopefully more unique)
+ * and gracefully fail down to the LCD above.
+ *
+ * NOTE: Darwin (Mac OS X) seems to be the most restrictive
+ * implementation. Versions previous to Darwin 6.2 had the 14
+ * char limit, but later rev's allow up to 31 characters.
+ *
+ * FIXME: There is a small window of opportunity where
+ * instead of getting a new semaphore descriptor, we get
+ * a previously obtained one. This can happen if the requests
+ * are made at the "same time" and in the small span of time between
+ * the sem_open and the sem_unlink. Use of O_EXCL does not
+ * help here however...
+ *
+ */
+ now = apr_time_now();
+ sec = apr_time_sec(now);
+ usec = apr_time_usec(now);
+ apr_snprintf(semname, sizeof(semname), "/ApR.%lxZ%lx", sec, usec);
+ psem = sem_open((const char *) semname, O_CREAT, 0644, 1);
+ if ((psem == (sem_t *)SEM_FAILED) && (errno == ENAMETOOLONG)) {
+ /* Oh well, good try */
+ semname[13] = '\0';
+ psem = sem_open((const char *) semname, O_CREAT, 0644, 1);
+ }
+
+ if (psem == (sem_t *)SEM_FAILED) {
+ stat = errno;
+ proc_mutex_posix_cleanup(new_mutex);
+ return stat;
+ }
+ /* Ahhh. The joys of Posix sems. Predelete it... */
+ sem_unlink((const char *) semname);
+ new_mutex->interproc->filedes = (int)psem; /* Ugg */
+ new_mutex->fname = apr_pstrdup(new_mutex->pool, semname);
+ apr_pool_cleanup_register(new_mutex->pool, (void *)new_mutex,
+ apr_proc_mutex_cleanup,
+ apr_pool_cleanup_null);
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_posix_acquire(apr_proc_mutex_t *mutex)
+{
+ int rc;
+
+ if ((rc = sem_wait((sem_t *)mutex->interproc->filedes)) < 0) {
+ return errno;
+ }
+ mutex->curr_locked = 1;
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_posix_release(apr_proc_mutex_t *mutex)
+{
+ int rc;
+
+ mutex->curr_locked = 0;
+ if ((rc = sem_post((sem_t *)mutex->interproc->filedes)) < 0) {
+ return errno;
+ }
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_posix_child_init(apr_proc_mutex_t **mutex,
+ apr_pool_t *cont,
+ const char *fname)
+{
+ return APR_SUCCESS;
+}
+
+const apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_posix_methods =
+{
+#if APR_PROCESS_LOCK_IS_GLOBAL || !APR_HAS_THREADS || defined(POSIXSEM_IS_GLOBAL)
+ APR_PROCESS_LOCK_MECH_IS_GLOBAL,
+#else
+ 0,
+#endif
+ proc_mutex_posix_create,
+ proc_mutex_posix_acquire,
+ proc_mutex_no_tryacquire,
+ proc_mutex_posix_release,
+ proc_mutex_posix_cleanup,
+ proc_mutex_posix_child_init,
+ "posixsem"
+};
+
+#endif /* Posix sem implementation */
+
+#if APR_HAS_SYSVSEM_SERIALIZE
+
+static struct sembuf proc_mutex_op_on;
+static struct sembuf proc_mutex_op_off;
+
+static void proc_mutex_sysv_setup(void)
+{
+ proc_mutex_op_on.sem_num = 0;
+ proc_mutex_op_on.sem_op = -1;
+ proc_mutex_op_on.sem_flg = SEM_UNDO;
+ proc_mutex_op_off.sem_num = 0;
+ proc_mutex_op_off.sem_op = 1;
+ proc_mutex_op_off.sem_flg = SEM_UNDO;
+}
+
+static apr_status_t proc_mutex_sysv_cleanup(void *mutex_)
+{
+ apr_proc_mutex_t *mutex=mutex_;
+ union semun ick;
+
+ if (mutex->interproc->filedes != -1) {
+ ick.val = 0;
+ semctl(mutex->interproc->filedes, 0, IPC_RMID, ick);
+ }
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_sysv_create(apr_proc_mutex_t *new_mutex,
+ const char *fname)
+{
+ union semun ick;
+ apr_status_t rv;
+
+ new_mutex->interproc = apr_palloc(new_mutex->pool, sizeof(*new_mutex->interproc));
+ new_mutex->interproc->filedes = semget(IPC_PRIVATE, 1, IPC_CREAT | 0600);
+
+ if (new_mutex->interproc->filedes < 0) {
+ rv = errno;
+ proc_mutex_sysv_cleanup(new_mutex);
+ return rv;
+ }
+ ick.val = 1;
+ if (semctl(new_mutex->interproc->filedes, 0, SETVAL, ick) < 0) {
+ rv = errno;
+ proc_mutex_sysv_cleanup(new_mutex);
+ return rv;
+ }
+ new_mutex->curr_locked = 0;
+ apr_pool_cleanup_register(new_mutex->pool,
+ (void *)new_mutex, apr_proc_mutex_cleanup,
+ apr_pool_cleanup_null);
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_sysv_acquire(apr_proc_mutex_t *mutex)
+{
+ int rc;
+
+ do {
+ rc = semop(mutex->interproc->filedes, &proc_mutex_op_on, 1);
+ } while (rc < 0 && errno == EINTR);
+ if (rc < 0) {
+ return errno;
+ }
+ mutex->curr_locked = 1;
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_sysv_release(apr_proc_mutex_t *mutex)
+{
+ int rc;
+
+ mutex->curr_locked = 0;
+ do {
+ rc = semop(mutex->interproc->filedes, &proc_mutex_op_off, 1);
+ } while (rc < 0 && errno == EINTR);
+ if (rc < 0) {
+ return errno;
+ }
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_sysv_child_init(apr_proc_mutex_t **mutex, apr_pool_t *cont, const char *fname)
+{
+ return APR_SUCCESS;
+}
+
+const apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_sysv_methods =
+{
+#if APR_PROCESS_LOCK_IS_GLOBAL || !APR_HAS_THREADS || defined(SYSVSEM_IS_GLOBAL)
+ APR_PROCESS_LOCK_MECH_IS_GLOBAL,
+#else
+ 0,
+#endif
+ proc_mutex_sysv_create,
+ proc_mutex_sysv_acquire,
+ proc_mutex_no_tryacquire,
+ proc_mutex_sysv_release,
+ proc_mutex_sysv_cleanup,
+ proc_mutex_sysv_child_init,
+ "sysvsem"
+};
+
+#endif /* SysV sem implementation */
+
+#if APR_HAS_PROC_PTHREAD_SERIALIZE
+
+static void proc_mutex_proc_pthread_setup(void)
+{
+}
+
+static apr_status_t proc_mutex_proc_pthread_cleanup(void *mutex_)
+{
+ apr_proc_mutex_t *mutex=mutex_;
+ apr_status_t rv;
+
+ if (mutex->curr_locked == 1) {
+ if ((rv = pthread_mutex_unlock(mutex->pthread_interproc))) {
+#ifdef PTHREAD_SETS_ERRNO
+ rv = errno;
+#endif
+ return rv;
+ }
+ if (munmap((caddr_t)mutex->pthread_interproc, sizeof(pthread_mutex_t))){
+ return errno;
+ }
+ }
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_proc_pthread_create(apr_proc_mutex_t *new_mutex,
+ const char *fname)
+{
+ apr_status_t rv;
+ int fd;
+ pthread_mutexattr_t mattr;
+
+ fd = open("/dev/zero", O_RDWR);
+ if (fd < 0) {
+ return errno;
+ }
+
+ new_mutex->pthread_interproc = (pthread_mutex_t *)mmap(
+ (caddr_t) 0,
+ sizeof(pthread_mutex_t),
+ PROT_READ | PROT_WRITE, MAP_SHARED,
+ fd, 0);
+ if (new_mutex->pthread_interproc == (pthread_mutex_t *) (caddr_t) -1) {
+ return errno;
+ }
+ close(fd);
+ if ((rv = pthread_mutexattr_init(&mattr))) {
+#ifdef PTHREAD_SETS_ERRNO
+ rv = errno;
+#endif
+ proc_mutex_proc_pthread_cleanup(new_mutex);
+ return rv;
+ }
+ if ((rv = pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED))) {
+#ifdef PTHREAD_SETS_ERRNO
+ rv = errno;
+#endif
+ proc_mutex_proc_pthread_cleanup(new_mutex);
+ return rv;
+ }
+
+#ifdef HAVE_PTHREAD_MUTEX_ROBUST
+ if ((rv = pthread_mutexattr_setrobust_np(&mattr,
+ PTHREAD_MUTEX_ROBUST_NP))) {
+#ifdef PTHREAD_SETS_ERRNO
+ rv = errno;
+#endif
+ proc_mutex_proc_pthread_cleanup(new_mutex);
+ return rv;
+ }
+ if ((rv = pthread_mutexattr_setprotocol(&mattr, PTHREAD_PRIO_INHERIT))) {
+#ifdef PTHREAD_SETS_ERRNO
+ rv = errno;
+#endif
+ proc_mutex_proc_pthread_cleanup(new_mutex);
+ return rv;
+ }
+#endif /* HAVE_PTHREAD_MUTEX_ROBUST */
+
+ if ((rv = pthread_mutex_init(new_mutex->pthread_interproc, &mattr))) {
+#ifdef PTHREAD_SETS_ERRNO
+ rv = errno;
+#endif
+ proc_mutex_proc_pthread_cleanup(new_mutex);
+ return rv;
+ }
+
+ if ((rv = pthread_mutexattr_destroy(&mattr))) {
+#ifdef PTHREAD_SETS_ERRNO
+ rv = errno;
+#endif
+ proc_mutex_proc_pthread_cleanup(new_mutex);
+ return rv;
+ }
+
+ new_mutex->curr_locked = 0;
+ apr_pool_cleanup_register(new_mutex->pool,
+ (void *)new_mutex,
+ apr_proc_mutex_cleanup,
+ apr_pool_cleanup_null);
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_proc_pthread_acquire(apr_proc_mutex_t *mutex)
+{
+ apr_status_t rv;
+
+ if ((rv = pthread_mutex_lock(mutex->pthread_interproc))) {
+#ifdef PTHREAD_SETS_ERRNO
+ rv = errno;
+#endif
+#ifdef HAVE_PTHREAD_MUTEX_ROBUST
+ /* Okay, our owner died. Let's try to make it consistent again. */
+ if (rv == EOWNERDEAD) {
+ pthread_mutex_consistent_np(mutex->pthread_interproc);
+ }
+ else
+ return rv;
+#else
+ return rv;
+#endif
+ }
+ mutex->curr_locked = 1;
+ return APR_SUCCESS;
+}
+
+/* TODO: Add proc_mutex_proc_pthread_tryacquire(apr_proc_mutex_t *mutex) */
+
+static apr_status_t proc_mutex_proc_pthread_release(apr_proc_mutex_t *mutex)
+{
+ apr_status_t rv;
+
+ mutex->curr_locked = 0;
+ if ((rv = pthread_mutex_unlock(mutex->pthread_interproc))) {
+#ifdef PTHREAD_SETS_ERRNO
+ rv = errno;
+#endif
+ return rv;
+ }
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_proc_pthread_child_init(apr_proc_mutex_t **mutex,
+ apr_pool_t *cont,
+ const char *fname)
+{
+ return APR_SUCCESS;
+}
+
+const apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_proc_pthread_methods =
+{
+ APR_PROCESS_LOCK_MECH_IS_GLOBAL,
+ proc_mutex_proc_pthread_create,
+ proc_mutex_proc_pthread_acquire,
+ proc_mutex_no_tryacquire,
+ proc_mutex_proc_pthread_release,
+ proc_mutex_proc_pthread_cleanup,
+ proc_mutex_proc_pthread_child_init,
+ "pthread"
+};
+
+#endif
+
+#if APR_HAS_FCNTL_SERIALIZE
+
+static struct flock proc_mutex_lock_it;
+static struct flock proc_mutex_unlock_it;
+
+static apr_status_t proc_mutex_fcntl_release(apr_proc_mutex_t *);
+
+static void proc_mutex_fcntl_setup(void)
+{
+ proc_mutex_lock_it.l_whence = SEEK_SET; /* from current point */
+ proc_mutex_lock_it.l_start = 0; /* -"- */
+ proc_mutex_lock_it.l_len = 0; /* until end of file */
+ proc_mutex_lock_it.l_type = F_WRLCK; /* set exclusive/write lock */
+ proc_mutex_lock_it.l_pid = 0; /* pid not actually interesting */
+ proc_mutex_unlock_it.l_whence = SEEK_SET; /* from current point */
+ proc_mutex_unlock_it.l_start = 0; /* -"- */
+ proc_mutex_unlock_it.l_len = 0; /* until end of file */
+ proc_mutex_unlock_it.l_type = F_UNLCK; /* set exclusive/write lock */
+ proc_mutex_unlock_it.l_pid = 0; /* pid not actually interesting */
+}
+
+static apr_status_t proc_mutex_fcntl_cleanup(void *mutex_)
+{
+ apr_status_t status;
+ apr_proc_mutex_t *mutex=mutex_;
+
+ if (mutex->curr_locked == 1) {
+ status = proc_mutex_fcntl_release(mutex);
+ if (status != APR_SUCCESS)
+ return status;
+ }
+ if (mutex->interproc) { /* if it was opened successfully */
+ apr_file_close(mutex->interproc);
+ }
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_fcntl_create(apr_proc_mutex_t *new_mutex,
+ const char *fname)
+{
+ int rv;
+
+ if (fname) {
+ new_mutex->fname = apr_pstrdup(new_mutex->pool, fname);
+ rv = apr_file_open(&new_mutex->interproc, new_mutex->fname,
+ APR_CREATE | APR_WRITE | APR_EXCL,
+ APR_UREAD | APR_UWRITE | APR_GREAD | APR_WREAD,
+ new_mutex->pool);
+ }
+ else {
+ new_mutex->fname = apr_pstrdup(new_mutex->pool, "/tmp/aprXXXXXX");
+ rv = apr_file_mktemp(&new_mutex->interproc, new_mutex->fname,
+ APR_CREATE | APR_WRITE | APR_EXCL,
+ new_mutex->pool);
+ }
+
+ if (rv != APR_SUCCESS) {
+ proc_mutex_fcntl_cleanup(new_mutex);
+ return rv;
+ }
+
+ new_mutex->curr_locked = 0;
+ unlink(new_mutex->fname);
+ apr_pool_cleanup_register(new_mutex->pool,
+ (void*)new_mutex,
+ apr_proc_mutex_cleanup,
+ apr_pool_cleanup_null);
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_fcntl_acquire(apr_proc_mutex_t *mutex)
+{
+ int rc;
+
+ do {
+ rc = fcntl(mutex->interproc->filedes, F_SETLKW, &proc_mutex_lock_it);
+ } while (rc < 0 && errno == EINTR);
+ if (rc < 0) {
+ return errno;
+ }
+ mutex->curr_locked=1;
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_fcntl_release(apr_proc_mutex_t *mutex)
+{
+ int rc;
+
+ mutex->curr_locked=0;
+ do {
+ rc = fcntl(mutex->interproc->filedes, F_SETLKW, &proc_mutex_unlock_it);
+ } while (rc < 0 && errno == EINTR);
+ if (rc < 0) {
+ return errno;
+ }
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_fcntl_child_init(apr_proc_mutex_t **mutex,
+ apr_pool_t *pool,
+ const char *fname)
+{
+ return APR_SUCCESS;
+}
+
+const apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_fcntl_methods =
+{
+#if APR_PROCESS_LOCK_IS_GLOBAL || !APR_HAS_THREADS || defined(FCNTL_IS_GLOBAL)
+ APR_PROCESS_LOCK_MECH_IS_GLOBAL,
+#else
+ 0,
+#endif
+ proc_mutex_fcntl_create,
+ proc_mutex_fcntl_acquire,
+ proc_mutex_no_tryacquire,
+ proc_mutex_fcntl_release,
+ proc_mutex_fcntl_cleanup,
+ proc_mutex_fcntl_child_init,
+ "fcntl"
+};
+
+#endif /* fcntl implementation */
+
+#if APR_HAS_FLOCK_SERIALIZE
+
+static apr_status_t proc_mutex_flock_release(apr_proc_mutex_t *);
+
+static void proc_mutex_flock_setup(void)
+{
+}
+
+static apr_status_t proc_mutex_flock_cleanup(void *mutex_)
+{
+ apr_status_t status;
+ apr_proc_mutex_t *mutex=mutex_;
+
+ if (mutex->curr_locked == 1) {
+ status = proc_mutex_flock_release(mutex);
+ if (status != APR_SUCCESS)
+ return status;
+ }
+ if (mutex->interproc) { /* if it was opened properly */
+ apr_file_close(mutex->interproc);
+ }
+ unlink(mutex->fname);
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_flock_create(apr_proc_mutex_t *new_mutex,
+ const char *fname)
+{
+ int rv;
+
+ if (fname) {
+ new_mutex->fname = apr_pstrdup(new_mutex->pool, fname);
+ rv = apr_file_open(&new_mutex->interproc, new_mutex->fname,
+ APR_CREATE | APR_WRITE | APR_EXCL,
+ APR_UREAD | APR_UWRITE,
+ new_mutex->pool);
+ }
+ else {
+ new_mutex->fname = apr_pstrdup(new_mutex->pool, "/tmp/aprXXXXXX");
+ rv = apr_file_mktemp(&new_mutex->interproc, new_mutex->fname,
+ APR_CREATE | APR_WRITE | APR_EXCL,
+ new_mutex->pool);
+ }
+
+ if (rv != APR_SUCCESS) {
+ proc_mutex_flock_cleanup(new_mutex);
+ return errno;
+ }
+ new_mutex->curr_locked = 0;
+ apr_pool_cleanup_register(new_mutex->pool, (void *)new_mutex,
+ apr_proc_mutex_cleanup,
+ apr_pool_cleanup_null);
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_flock_acquire(apr_proc_mutex_t *mutex)
+{
+ int rc;
+
+ do {
+ rc = flock(mutex->interproc->filedes, LOCK_EX);
+ } while (rc < 0 && errno == EINTR);
+ if (rc < 0) {
+ return errno;
+ }
+ mutex->curr_locked = 1;
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_flock_release(apr_proc_mutex_t *mutex)
+{
+ int rc;
+
+ mutex->curr_locked = 0;
+ do {
+ rc = flock(mutex->interproc->filedes, LOCK_UN);
+ } while (rc < 0 && errno == EINTR);
+ if (rc < 0) {
+ return errno;
+ }
+ return APR_SUCCESS;
+}
+
+static apr_status_t proc_mutex_flock_child_init(apr_proc_mutex_t **mutex,
+ apr_pool_t *pool,
+ const char *fname)
+{
+ apr_proc_mutex_t *new_mutex;
+ int rv;
+
+ new_mutex = (apr_proc_mutex_t *)apr_palloc(pool, sizeof(apr_proc_mutex_t));
+
+ memcpy(new_mutex, *mutex, sizeof *new_mutex);
+ new_mutex->pool = pool;
+ if (!fname) {
+ fname = (*mutex)->fname;
+ }
+ new_mutex->fname = apr_pstrdup(pool, fname);
+ rv = apr_file_open(&new_mutex->interproc, new_mutex->fname,
+ APR_WRITE, 0, new_mutex->pool);
+ if (rv != APR_SUCCESS) {
+ proc_mutex_flock_cleanup(new_mutex);
+ return rv;
+ }
+ *mutex = new_mutex;
+ return APR_SUCCESS;
+}
+
+const apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_flock_methods =
+{
+#if APR_PROCESS_LOCK_IS_GLOBAL || !APR_HAS_THREADS || defined(FLOCK_IS_GLOBAL)
+ APR_PROCESS_LOCK_MECH_IS_GLOBAL,
+#else
+ 0,
+#endif
+ proc_mutex_flock_create,
+ proc_mutex_flock_acquire,
+ proc_mutex_no_tryacquire,
+ proc_mutex_flock_release,
+ proc_mutex_flock_cleanup,
+ proc_mutex_flock_child_init,
+ "flock"
+};
+
+#endif /* flock implementation */
+
+void apr_proc_mutex_unix_setup_lock(void)
+{
+#if APR_HAS_POSIXSEM_SERIALIZE
+ proc_mutex_posix_setup();
+#endif
+#if APR_HAS_SYSVSEM_SERIALIZE
+ proc_mutex_sysv_setup();
+#endif
+#if APR_HAS_PROC_PTHREAD_SERIALIZE
+ proc_mutex_proc_pthread_setup();
+#endif
+#if APR_HAS_FCNTL_SERIALIZE
+ proc_mutex_fcntl_setup();
+#endif
+#if APR_HAS_FLOCK_SERIALIZE
+ proc_mutex_flock_setup();
+#endif
+}
+
+static apr_status_t proc_mutex_choose_method(apr_proc_mutex_t *new_mutex, apr_lockmech_e mech)
+{
+ switch (mech) {
+ case APR_LOCK_FCNTL:
+#if APR_HAS_FCNTL_SERIALIZE
+ new_mutex->inter_meth = &apr_proc_mutex_unix_fcntl_methods;
+#else
+ return APR_ENOTIMPL;
+#endif
+ break;
+ case APR_LOCK_FLOCK:
+#if APR_HAS_FLOCK_SERIALIZE
+ new_mutex->inter_meth = &apr_proc_mutex_unix_flock_methods;
+#else
+ return APR_ENOTIMPL;
+#endif
+ break;
+ case APR_LOCK_SYSVSEM:
+#if APR_HAS_SYSVSEM_SERIALIZE
+ new_mutex->inter_meth = &apr_proc_mutex_unix_sysv_methods;
+#else
+ return APR_ENOTIMPL;
+#endif
+ break;
+ case APR_LOCK_POSIXSEM:
+#if APR_HAS_POSIXSEM_SERIALIZE
+ new_mutex->inter_meth = &apr_proc_mutex_unix_posix_methods;
+#else
+ return APR_ENOTIMPL;
+#endif
+ break;
+ case APR_LOCK_PROC_PTHREAD:
+#if APR_HAS_PROC_PTHREAD_SERIALIZE
+ new_mutex->inter_meth = &apr_proc_mutex_unix_proc_pthread_methods;
+#else
+ return APR_ENOTIMPL;
+#endif
+ break;
+ case APR_LOCK_DEFAULT:
+#if APR_USE_FLOCK_SERIALIZE
+ new_mutex->inter_meth = &apr_proc_mutex_unix_flock_methods;
+#elif APR_USE_SYSVSEM_SERIALIZE
+ new_mutex->inter_meth = &apr_proc_mutex_unix_sysv_methods;
+#elif APR_USE_FCNTL_SERIALIZE
+ new_mutex->inter_meth = &apr_proc_mutex_unix_fcntl_methods;
+#elif APR_USE_PROC_PTHREAD_SERIALIZE
+ new_mutex->inter_meth = &apr_proc_mutex_unix_proc_pthread_methods;
+#elif APR_USE_POSIXSEM_SERIALIZE
+ new_mutex->inter_meth = &apr_proc_mutex_unix_posix_methods;
+#else
+ return APR_ENOTIMPL;
+#endif
+ break;
+ default:
+ return APR_ENOTIMPL;
+ }
+ return APR_SUCCESS;
+}
+
+APR_DECLARE(const char *) apr_proc_mutex_defname(void)
+{
+ apr_status_t rv;
+ apr_proc_mutex_t mutex;
+
+ if ((rv = proc_mutex_choose_method(&mutex, APR_LOCK_DEFAULT)) != APR_SUCCESS) {
+ return "unknown";
+ }
+ mutex.meth = mutex.inter_meth;
+
+ return apr_proc_mutex_name(&mutex);
+}
+
+static apr_status_t proc_mutex_create(apr_proc_mutex_t *new_mutex, apr_lockmech_e mech, const char *fname)
+{
+ apr_status_t rv;
+
+ if ((rv = proc_mutex_choose_method(new_mutex, mech)) != APR_SUCCESS) {
+ return rv;
+ }
+
+ new_mutex->meth = new_mutex->inter_meth;
+
+ if ((rv = new_mutex->meth->create(new_mutex, fname)) != APR_SUCCESS) {
+ return rv;
+ }
+
+ return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_create(apr_proc_mutex_t **mutex,
+ const char *fname,
+ apr_lockmech_e mech,
+ apr_pool_t *pool)
+{
+ apr_proc_mutex_t *new_mutex;
+ apr_status_t rv;
+
+ new_mutex = (apr_proc_mutex_t *)apr_pcalloc(pool,
+ sizeof(apr_proc_mutex_t));
+
+ new_mutex->pool = pool;
+#if APR_HAS_SYSVSEM_SERIALIZE || APR_HAS_FCNTL_SERIALIZE || APR_HAS_FLOCK_SERIALIZE || APR_HAS_POSIXSEM_SERIALIZE
+ new_mutex->interproc = NULL;
+#endif
+
+ if ((rv = proc_mutex_create(new_mutex, mech, fname)) != APR_SUCCESS)
+ return rv;
+
+ *mutex = new_mutex;
+ return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_child_init(apr_proc_mutex_t **mutex,
+ const char *fname,
+ apr_pool_t *pool)
+{
+ return (*mutex)->meth->child_init(mutex, pool, fname);
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_lock(apr_proc_mutex_t *mutex)
+{
+ return mutex->meth->acquire(mutex);
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_trylock(apr_proc_mutex_t *mutex)
+{
+ return mutex->meth->tryacquire(mutex);
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_unlock(apr_proc_mutex_t *mutex)
+{
+ return mutex->meth->release(mutex);
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_cleanup(void *mutex)
+{
+ return ((apr_proc_mutex_t *)mutex)->meth->cleanup(mutex);
+}
+
+APR_DECLARE(const char *) apr_proc_mutex_name(apr_proc_mutex_t *mutex)
+{
+ return mutex->meth->name;
+}
+
+APR_DECLARE(const char *) apr_proc_mutex_lockfile(apr_proc_mutex_t *mutex)
+{
+ /* posix sems use the fname field but don't use a file,
+ * so be careful
+ */
+ if (!strcmp(mutex->meth->name, "flock") ||
+ !strcmp(mutex->meth->name, "fcntl")) {
+ return mutex->fname;
+ }
+ return NULL;
+}
+
+APR_POOL_IMPLEMENT_ACCESSOR(proc_mutex)
+
+/* Implement OS-specific accessors defined in apr_portable.h */
+
+APR_DECLARE(apr_status_t) apr_os_proc_mutex_get(apr_os_proc_mutex_t *ospmutex,
+ apr_proc_mutex_t *pmutex)
+{
+#if APR_HAS_SYSVSEM_SERIALIZE || APR_HAS_FCNTL_SERIALIZE || APR_HAS_FLOCK_SERIALIZE || APR_HAS_POSIXSEM_SERIALIZE
+ ospmutex->crossproc = pmutex->interproc->filedes;
+#endif
+#if APR_HAS_PROC_PTHREAD_SERIALIZE
+ ospmutex->pthread_interproc = pmutex->pthread_interproc;
+#endif
+ return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_os_proc_mutex_put(apr_proc_mutex_t **pmutex,
+ apr_os_proc_mutex_t *ospmutex,
+ apr_pool_t *pool)
+{
+ if (pool == NULL) {
+ return APR_ENOPOOL;
+ }
+ if ((*pmutex) == NULL) {
+ (*pmutex) = (apr_proc_mutex_t *)apr_pcalloc(pool,
+ sizeof(apr_proc_mutex_t));
+ (*pmutex)->pool = pool;
+ }
+#if APR_HAS_SYSVSEM_SERIALIZE || APR_HAS_FCNTL_SERIALIZE || APR_HAS_FLOCK_SERIALIZE || APR_HAS_POSIXSEM_SERIALIZE
+ apr_os_file_put(&(*pmutex)->interproc, &ospmutex->crossproc, 0, pool);
+#endif
+#if APR_HAS_PROC_PTHREAD_SERIALIZE
+ (*pmutex)->pthread_interproc = ospmutex->pthread_interproc;
+#endif
+ return APR_SUCCESS;
+}
+
Code Review / bottlenecks.git / blobdiff