Add the thread functions to top level lib/util.

Not yet used, that's the next step.
Jeremy.

1 files changed, 120 insertions, 0 deletions

diff --git a/lib/util/smb_threads.h b/lib/util/smb_threads.h
new file mode 100644
index 0000000000..2ca163be9a
--- /dev/null
+++ b/lib/util/smb_threads.h
@@ -0,0 +1,120 @@
+/*
+	Unix SMB/CIFS implementation.
+	SMB thread interface functions.
+	Copyright (C) Jeremy Allison, 2009.
+
+	This program is free software; 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 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _smb_threads_h_
+#define _smb_threads_h_
+
+enum smb_thread_lock_type {
+	SMB_THREAD_LOCK = 1,
+	SMB_THREAD_UNLOCK
+};
+
+struct smb_thread_functions {
+	/* Mutex and tls functions. */
+	int (*create_mutex)(const char *lockname,
+			void **pplock,
+			const char *location);
+	void (*destroy_mutex)(void *plock,
+			const char *location);
+	int (*lock_mutex)(void *plock, enum smb_thread_lock_type lock_type,
+			const char *location);
+
+	/* Thread local storage. */
+	int (*create_tls)(const char *keyname,
+			void **ppkey,
+			const char *location);
+	void (*destroy_tls)(void *pkey,
+			const char *location);
+	int (*set_tls)(void *pkey, const void *pval, const char *location);
+	void *(*get_tls)(void *pkey, const char *location);
+};
+
+extern const struct smb_thread_functions *global_tfp;
+
+/* Define the pthread version of the functions. */
+
+#define SMB_THREADS_DEF_PTHREAD_IMPLEMENTATION(tf) \
+ \
+static int smb_create_mutex_pthread(const char *lockname, void **pplock, const char *location) \
+{ \
+        pthread_mutex_t *pmut = (pthread_mutex_t *)malloc(sizeof(pthread_mutex_t)); \
+        if (!pmut) { \
+                return ENOMEM; \
+        } \
+        pthread_mutex_init(pmut, NULL); \
+        *pplock = (void *)pmut; \
+        return 0; \
+} \
+ \
+static void smb_destroy_mutex_pthread(void *plock, const char *location) \
+{ \
+        pthread_mutex_destroy((pthread_mutex_t *)plock); \
+	free(plock); \
+} \
+ \
+static int smb_lock_pthread(void *plock, enum smb_thread_lock_type lock_type, const char *location) \
+{ \
+        if (lock_type == SMB_THREAD_UNLOCK) { \
+                return pthread_mutex_unlock((pthread_mutex_t *)plock); \
+        } else { \
+                return pthread_mutex_lock((pthread_mutex_t *)plock); \
+        } \
+} \
+ \
+static int smb_create_tls_pthread(const char *keyname, void **ppkey, const char *location) \
+{ \
+        int ret; \
+        pthread_key_t *pkey = (pthread_key_t *)malloc(sizeof(pthread_key_t)); \
+        if (!pkey) { \
+                return ENOMEM; \
+        } \
+        ret = pthread_key_create(pkey, NULL); \
+        if (ret) { \
+                return ret; \
+        } \
+        *ppkey = (void *)pkey; \
+        return 0; \
+} \
+ \
+static void smb_destroy_tls_pthread(void *pkey, const char *location) \
+{ \
+        pthread_key_delete(*(pthread_key_t *)pkey); \
+        free(pkey); \
+} \
+ \
+static int smb_set_tls_pthread(void *pkey, const void *pval, const char *location) \
+{ \
+        return pthread_setspecific(*(pthread_key_t *)pkey, pval); \
+} \
+ \
+static void *smb_get_tls_pthread(void *pkey, const char *location) \
+{ \
+        return pthread_getspecific(*(pthread_key_t *)pkey); \
+} \
+ \
+static const struct smb_thread_functions (tf) = { \
+                        smb_create_mutex_pthread, \
+                        smb_destroy_mutex_pthread, \
+                        smb_lock_pthread, \
+                        smb_create_tls_pthread, \
+                        smb_destroy_tls_pthread, \
+                        smb_set_tls_pthread, \
+                        smb_get_tls_pthread }
+
+#endif