diff options
Diffstat (limited to 'locks/win32/proc_mutex.c')
| -rw-r--r-- | locks/win32/proc_mutex.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/locks/win32/proc_mutex.c b/locks/win32/proc_mutex.c new file mode 100644 index 0000000..3bd25ef --- /dev/null +++ b/locks/win32/proc_mutex.c @@ -0,0 +1,228 @@ +/* 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; + + /* 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_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(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_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 *mutex) +{ + *ospmutex = mutex->handle; + 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_palloc(pool, + sizeof(apr_proc_mutex_t)); + (*pmutex)->pool = pool; + } + (*pmutex)->handle = *ospmutex; + return APR_SUCCESS; +} + |