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-rw-r--r--locks/win32/proc_mutex.c301
1 files changed, 301 insertions, 0 deletions
diff --git a/locks/win32/proc_mutex.c b/locks/win32/proc_mutex.c
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+++ b/locks/win32/proc_mutex.c
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+/* 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_private.h"
+#include "apr_general.h"
+#include "apr_strings.h"
+#include "apr_portable.h"
+#include "apr_arch_file_io.h"
+#include "apr_arch_proc_mutex.h"
+#include "apr_arch_misc.h"
+
+static apr_status_t proc_mutex_cleanup(void *mutex_)
+{
+ apr_proc_mutex_t *mutex = mutex_;
+
+ if (mutex->handle) {
+ if (CloseHandle(mutex->handle) == 0) {
+ return apr_get_os_error();
+ }
+ }
+ 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)
+{
+ HANDLE hMutex;
+ void *mutexkey;
+
+ if (mech != APR_LOCK_DEFAULT && mech != APR_LOCK_DEFAULT_TIMED) {
+ return APR_ENOTIMPL;
+ }
+
+ /* res_name_from_filename turns fname into a pseduo-name
+ * without slashes or backslashes, and prepends the \global
+ * prefix on Win2K and later
+ */
+ if (fname) {
+ mutexkey = res_name_from_filename(fname, 1, pool);
+ }
+ else {
+ mutexkey = NULL;
+ }
+
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ {
+ hMutex = CreateMutexW(NULL, FALSE, mutexkey);
+ }
+#endif
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ {
+ hMutex = CreateMutexA(NULL, FALSE, mutexkey);
+ }
+#endif
+
+ if (!hMutex) {
+ return apr_get_os_error();
+ }
+
+ *mutex = (apr_proc_mutex_t *)apr_palloc(pool, sizeof(apr_proc_mutex_t));
+ (*mutex)->pool = pool;
+ (*mutex)->handle = hMutex;
+ (*mutex)->fname = fname;
+ apr_pool_cleanup_register((*mutex)->pool, *mutex,
+ proc_mutex_cleanup, apr_pool_cleanup_null);
+ 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)
+{
+ HANDLE hMutex;
+ void *mutexkey;
+
+ if (!fname) {
+ /* Reinitializing unnamed mutexes is a noop in the Unix code. */
+ return APR_SUCCESS;
+ }
+
+ /* res_name_from_filename turns file into a pseudo-name
+ * without slashes or backslashes, and prepends the \global
+ * prefix on Win2K and later
+ */
+ mutexkey = res_name_from_filename(fname, 1, pool);
+
+#if defined(_WIN32_WCE)
+ hMutex = CreateMutex(NULL, FALSE, mutexkey);
+ if (hMutex && ERROR_ALREADY_EXISTS != GetLastError()) {
+ CloseHandle(hMutex);
+ hMutex = NULL;
+ SetLastError(ERROR_FILE_NOT_FOUND);
+ }
+#else
+#if APR_HAS_UNICODE_FS
+ IF_WIN_OS_IS_UNICODE
+ {
+ hMutex = OpenMutexW(MUTEX_ALL_ACCESS, FALSE, mutexkey);
+ }
+#endif
+#if APR_HAS_ANSI_FS
+ ELSE_WIN_OS_IS_ANSI
+ {
+ hMutex = OpenMutexA(MUTEX_ALL_ACCESS, FALSE, mutexkey);
+ }
+#endif
+#endif
+
+ if (!hMutex) {
+ return apr_get_os_error();
+ }
+
+ *mutex = (apr_proc_mutex_t *)apr_palloc(pool, sizeof(apr_proc_mutex_t));
+ (*mutex)->pool = pool;
+ (*mutex)->handle = hMutex;
+ (*mutex)->fname = fname;
+ apr_pool_cleanup_register((*mutex)->pool, *mutex,
+ proc_mutex_cleanup, apr_pool_cleanup_null);
+ return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_lock(apr_proc_mutex_t *mutex)
+{
+ DWORD rv;
+
+ rv = WaitForSingleObject(mutex->handle, INFINITE);
+
+ if (rv == WAIT_OBJECT_0 || rv == WAIT_ABANDONED) {
+ return APR_SUCCESS;
+ }
+ return apr_get_os_error();
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_trylock(apr_proc_mutex_t *mutex)
+{
+ DWORD rv;
+
+ rv = WaitForSingleObject(mutex->handle, 0);
+
+ if (rv == WAIT_OBJECT_0 || rv == WAIT_ABANDONED) {
+ return APR_SUCCESS;
+ }
+ else if (rv == WAIT_TIMEOUT) {
+ return APR_EBUSY;
+ }
+ return apr_get_os_error();
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_timedlock(apr_proc_mutex_t *mutex,
+ apr_interval_time_t timeout)
+{
+ DWORD rv, timeout_ms = 0;
+ apr_interval_time_t t = timeout;
+
+ do {
+ if (t > 0) {
+ /* Given timeout is 64bit usecs whereas Windows timeouts are
+ * 32bit msecs and below INFINITE (2^32 - 1), so we may need
+ * multiple timed out waits...
+ */
+ if (t > apr_time_from_msec(INFINITE - 1)) {
+ timeout_ms = INFINITE - 1;
+ t -= apr_time_from_msec(INFINITE - 1);
+ }
+ else {
+ timeout_ms = (DWORD)apr_time_as_msec(t);
+ t = 0;
+ }
+ }
+ rv = WaitForSingleObject(mutex->handle, timeout_ms);
+ } while (rv == WAIT_TIMEOUT && t > 0);
+
+ if (rv == WAIT_TIMEOUT) {
+ return APR_TIMEUP;
+ }
+ if (rv == WAIT_OBJECT_0 || rv == WAIT_ABANDONED) {
+ return APR_SUCCESS;
+ }
+ return apr_get_os_error();
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_unlock(apr_proc_mutex_t *mutex)
+{
+ if (ReleaseMutex(mutex->handle) == 0) {
+ return apr_get_os_error();
+ }
+ return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_destroy(apr_proc_mutex_t *mutex)
+{
+ apr_status_t stat;
+
+ stat = proc_mutex_cleanup(mutex);
+ if (stat == APR_SUCCESS) {
+ apr_pool_cleanup_kill(mutex->pool, mutex, proc_mutex_cleanup);
+ }
+ return stat;
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_cleanup(void *mutex)
+{
+ return apr_proc_mutex_destroy((apr_proc_mutex_t *)mutex);
+}
+
+APR_DECLARE(const char *) apr_proc_mutex_lockfile(apr_proc_mutex_t *mutex)
+{
+ return mutex->fname;
+}
+
+APR_DECLARE(apr_lockmech_e) apr_proc_mutex_mech(apr_proc_mutex_t *mutex)
+{
+ return APR_LOCK_DEFAULT;
+}
+
+APR_DECLARE(const char *) apr_proc_mutex_name(apr_proc_mutex_t *mutex)
+{
+ return apr_proc_mutex_defname();
+}
+
+APR_DECLARE(const char *) apr_proc_mutex_defname(void)
+{
+ return "win32mutex";
+}
+
+APR_PERMS_SET_ENOTIMPL(proc_mutex)
+
+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_ex(apr_os_proc_mutex_t *ospmutex,
+ apr_proc_mutex_t *pmutex,
+ apr_lockmech_e *mech)
+{
+ *ospmutex = pmutex->handle;
+ if (mech) {
+ *mech = APR_LOCK_DEFAULT;
+ }
+ return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_os_proc_mutex_get(apr_os_proc_mutex_t *ospmutex,
+ apr_proc_mutex_t *pmutex)
+{
+ return apr_os_proc_mutex_get_ex(ospmutex, pmutex, NULL);
+}
+
+APR_DECLARE(apr_status_t) apr_os_proc_mutex_put_ex(apr_proc_mutex_t **pmutex,
+ apr_os_proc_mutex_t *ospmutex,
+ apr_lockmech_e mech,
+ int register_cleanup,
+ apr_pool_t *pool)
+{
+ if (pool == NULL) {
+ return APR_ENOPOOL;
+ }
+ if (mech != APR_LOCK_DEFAULT && mech != APR_LOCK_DEFAULT_TIMED) {
+ return APR_ENOTIMPL;
+ }
+
+ if ((*pmutex) == NULL) {
+ (*pmutex) = (apr_proc_mutex_t *)apr_palloc(pool,
+ sizeof(apr_proc_mutex_t));
+ (*pmutex)->pool = pool;
+ }
+ (*pmutex)->handle = *ospmutex;
+
+ if (register_cleanup) {
+ apr_pool_cleanup_register(pool, *pmutex, proc_mutex_cleanup,
+ apr_pool_cleanup_null);
+ }
+ 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)
+{
+ return apr_os_proc_mutex_put_ex(pmutex, ospmutex, APR_LOCK_DEFAULT,
+ 0, pool);
+}
+