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authorDerrell Lipman <derrell@samba.org>2006-09-26 16:58:27 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 14:20:21 -0500
commit77e8402dd68079c0e245fc8826daf2c6ad334766 (patch)
tree64f65c7d3fb7f3aa970311f70e3f8bae4c0fc40c /source4/lib/appweb/ejs-2.0/mpr/mprLock.c
parent06de0f0b743056ba845de000339d4c3beb7cb845 (diff)
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r18925: Add current snapshot of the ejs-2.0 code. Tridge, will you be incorporating this?
(This used to be commit 917af234a8d517f82bd42256a940608a16b988f4)
Diffstat (limited to 'source4/lib/appweb/ejs-2.0/mpr/mprLock.c')
-rw-r--r--source4/lib/appweb/ejs-2.0/mpr/mprLock.c266
1 files changed, 266 insertions, 0 deletions
diff --git a/source4/lib/appweb/ejs-2.0/mpr/mprLock.c b/source4/lib/appweb/ejs-2.0/mpr/mprLock.c
new file mode 100644
index 0000000000..df9ce276d4
--- /dev/null
+++ b/source4/lib/appweb/ejs-2.0/mpr/mprLock.c
@@ -0,0 +1,266 @@
+/**
+ * @file mprThread.c
+ * @brief Mbedthis Portable Runtime Base Thread Locking Support
+ */
+
+/*
+ * @copy default
+ *
+ * Copyright (c) Mbedthis Software LLC, 2003-2006. All Rights Reserved.
+ *
+ * This software is distributed under commercial and open source licenses.
+ * You may use the GPL open source license described below or you may acquire
+ * a commercial license from Mbedthis Software. You agree to be fully bound
+ * by the terms of either license. Consult the LICENSE.TXT distributed with
+ * this software for full details.
+ *
+ * This software is open source; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version. See the GNU General Public License for more
+ * details at: http://www.mbedthis.com/downloads/gplLicense.html
+ *
+ * This program is distributed WITHOUT ANY WARRANTY; without even the
+ * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * This GPL license does NOT permit incorporating this software into
+ * proprietary programs. If you are unable to comply with the GPL, you must
+ * acquire a commercial license to use this software. Commercial licenses
+ * for this software and support services are available from Mbedthis
+ * Software at http://www.mbedthis.com
+ *
+ * @end
+ */
+
+#include "mpr.h"
+
+#if BLD_FEATURE_MULTITHREAD
+/************************************ Code ************************************/
+
+void mprInitThreads(MprApp *app)
+{
+ mprAssert(app);
+
+ if (app->globalLock == 0) {
+ app->globalLock = mprCreateLock(app);
+ app->allocLock = mprCreateLock(app);
+ }
+}
+
+/******************************************************************************/
+
+void mprTermThreads(MprApp *app)
+{
+ mprAssert(app);
+
+ if (app->globalLock) {
+ mprDestroyLock(app->globalLock);
+ app->globalLock = 0;
+ }
+ if (app->allocLock) {
+ MprLock *lock = app->allocLock;
+ app->allocLock = 0;
+ mprDestroyLock(lock);
+ }
+}
+
+/******************************************************************************/
+
+MprLock *mprCreateLock(MprCtx ctx)
+{
+ MprLock *lock;
+
+ mprAssert(ctx);
+
+ lock = mprAllocType(ctx, MprLock);
+
+#if BLD_HOST_UNIX
+ pthread_mutexattr_t attr;
+
+ pthread_mutexattr_init(&attr);
+ pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE_NP);
+ pthread_mutex_init(&lock->cs, &attr);
+ pthread_mutexattr_destroy(&attr);
+#elif WIN
+ InitializeCriticalSectionAndSpinCount(&lock->cs, 5000);
+#elif VXWORKS
+ lock->cs = semMCreate(SEM_Q_PRIORITY | SEM_DELETE_SAFE |
+ SEM_INVERSION_SAFE);
+ if (lock->cs == 0) {
+ mprAssert(0);
+ mprFree(lock);
+ return 0;
+ }
+#endif
+ return lock;
+}
+
+/******************************************************************************/
+/*
+ * Destroy a lock. Must be locked on entrance.
+ */
+
+void mprDestroyLock(MprLock *lock)
+{
+ mprAssert(lock);
+ if (lock == 0) {
+ return;
+ }
+
+#if BLD_HOST_UNIX
+ pthread_mutex_unlock(&lock->cs);
+ pthread_mutex_destroy(&lock->cs);
+#elif WIN
+ DeleteCriticalSection(&lock->cs);
+#elif VXWORKS
+ semDelete(lock->cs);
+#endif
+ mprFree(lock);
+}
+
+/******************************************************************************/
+/*
+ * Lock a mutex
+ */
+
+void mprLock(MprLock *lock)
+{
+ /*
+ * OPT -- Do this just so we can allocate MprApp before we have created its
+ * lock. Should remove this test here and in mprUnlock.
+ */
+ if (lock == 0) {
+ return;
+ }
+
+#if BLD_HOST_UNIX
+ pthread_mutex_lock(&lock->cs);
+#elif WIN
+ EnterCriticalSection(&lock->cs);
+#elif VXWORKS
+ semTake(lock->cs, WAIT_FOREVER);
+#endif
+}
+
+/******************************************************************************/
+/*
+ * Try to attain a lock. Do not block!
+ */
+
+int mprTryLock(MprLock *lock)
+{
+ mprAssert(lock);
+
+#if BLD_HOST_UNIX
+ {
+ int err;
+
+ if ((err = pthread_mutex_trylock(&lock->cs)) != 0) {
+ if (err == EBUSY) {
+ return MPR_ERR_BUSY;
+ } else {
+ return MPR_ERR_CANT_ACCESS;
+ }
+ }
+ return 0;
+ }
+#elif WIN
+ if (TryEnterCriticalSection(&lock->cs) == 0) {
+ return MPR_ERR_BUSY;
+ }
+#elif VXWORKS
+ {
+ int rc;
+
+ rc = semTake(cs, NO_WAIT);
+ if (rc == -1) {
+ mprAssert(0);
+ }
+ if (rc == S_objLib_OBJ_UNAVAILABLE) {
+ return MPR_ERR_BUSY;
+ } else {
+ return MPR_ERR_CANT_ACCESS;
+ }
+ /* Success */
+ return 0;
+ }
+#endif
+ return 0;
+}
+
+/******************************************************************************/
+/*
+ * Unlock.
+ */
+
+void mprUnlock(MprLock *lock)
+{
+ if (lock == 0) {
+ return;
+ }
+
+#if BLD_HOST_UNIX
+ pthread_mutex_unlock(&lock->cs);
+#elif WIN
+ LeaveCriticalSection(&lock->cs);
+#elif VXWORKS
+ semGive(lock->cs);
+#endif
+}
+
+/******************************************************************************/
+/*
+ * Big global lock. Avoid using this.
+ */
+
+void mprGlobalLock(MprCtx ctx)
+{
+ MprApp *app;
+
+ app = mprGetApp(ctx);
+ mprAssert(app);
+
+ if (app && app->globalLock) {
+ mprLock(app->globalLock);
+ }
+}
+
+/******************************************************************************/
+
+void mprGlobalUnlock(MprCtx ctx)
+{
+ MprApp *app;
+
+ app = mprGetApp(ctx);
+ mprAssert(app);
+
+ if (app && app->globalLock) {
+ mprUnlock(app->globalLock);
+ }
+}
+
+/******************************************************************************/
+
+int mprGetCurrentThreadID()
+{
+#if BLD_HOST_UNIX
+ return (int) pthread_self();
+#elif WIN
+ return GetCurrentThreadId();
+#elif VXWORKS
+ return (int) pthread_self();
+#endif
+}
+
+/******************************************************************************/
+#endif /* BLD_FEATURE_MULTITHREAD */
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim:tw=78
+ * vim600: sw=4 ts=4 fdm=marker
+ * vim<600: sw=4 ts=4
+ */