Add the thread functions to top level lib/util.

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

3 files changed, 277 insertions, 0 deletions

diff --git a/lib/util/smb_threads.c b/lib/util/smb_threads.c
new file mode 100644
index 0000000000..84dec4d874
--- /dev/null
+++ b/lib/util/smb_threads.c
@@ -0,0 +1,105 @@
+/*
+   Unix SMB/CIFS implementation.
+   SMB client library implementation (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/>.
+*/
+
+/*
+ * This code is based in the ideas in openssl
+ * but somewhat simpler and expended to include
+ * thread local storage.
+ */
+
+#include "includes.h"
+
+#define NUM_GLOBAL_LOCKS 1
+
+/*********************************************************
+ Functions to vector the locking primitives used internally
+ by libsmbclient.
+*********************************************************/
+
+const struct smb_thread_functions *global_tfp;
+
+/*********************************************************
+ Dynamic lock array.
+*********************************************************/
+
+void **global_lock_array;
+
+/*********************************************************
+ Function to set the locking primitives used by libsmbclient.
+*********************************************************/
+
+int smb_thread_set_functions(const struct smb_thread_functions *tf)
+{
+	int i;
+
+	global_tfp = tf;
+
+	/* Here we initialize any static locks we're using. */
+	global_lock_array = (void **)SMB_MALLOC_ARRAY(void *, NUM_GLOBAL_LOCKS);
+	if (global_lock_array == NULL) {
+		return ENOMEM;
+	}
+
+	for (i = 0; i < NUM_GLOBAL_LOCKS; i++) {
+		char *name = NULL;
+		if (asprintf(&name, "global_lock_%d", i) == -1) {
+			SAFE_FREE(global_lock_array);
+			return ENOMEM;
+		}
+		global_tfp->create_mutex(name,
+				&global_lock_array[i],
+				__location__);
+		SAFE_FREE(name);
+	}
+
+	return 0;
+}
+
+#if 0
+/* Test. - pthread implementations. */
+#include <pthread.h>
+
+#ifdef malloc
+#undef malloc
+#endif
+
+SMB_THREADS_DEF_PTHREAD_IMPLEMENTATION(tf);
+
+/* Test function. */
+int test_threads(void)
+{
+	int ret;
+	void *plock = NULL;
+
+	smb_thread_set_functions(&tf);
+
+	if ((ret = SMB_THREAD_CREATE_MUTEX("test", plock)) != 0) {
+		printf("Create lock error: %d\n", ret);
+	}
+	if ((ret = SMB_THREAD_LOCK(plock, SMB_THREAD_LOCK)) != 0) {
+		printf("lock error: %d\n", ret);
+	}
+	if ((SMB_THREAD_LOCK(plock, SMB_THREAD_UNLOCK)) != 0) {
+		printf("unlock error: %d\n", ret);
+	}
+	SMB_THREAD_DESTROY_MUTEX(plock);
+
+	return 0;
+}
+#endif
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
diff --git a/lib/util/smb_threads_internal.h b/lib/util/smb_threads_internal.h
new file mode 100644
index 0000000000..3208bc27e1
--- /dev/null
+++ b/lib/util/smb_threads_internal.h
@@ -0,0 +1,52 @@
+/*
+	SMB/CIFS implementation.
+	SMB thread interface internal macros.
+	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_internal_h_
+#define _smb_threads_internal_h_
+
+#define SMB_THREAD_CREATE_MUTEX(name, lockvar) \
+	(global_tfp ? global_tfp->create_mutex((name), &(lockvar), __location__) : 0)
+
+#define SMB_THREAD_DESTROY_MUTEX(plock) \
+	do { \
+		if (global_tfp) { \
+			global_tfp->destroy_mutex(plock, __location__); \
+		}; \
+	} while (0)
+
+#define SMB_THREAD_LOCK(plock, type) \
+	(global_tfp ? global_tfp->lock_mutex((plock), (type), __location__) : 0)
+
+#define SMB_THREAD_CREATE_TLS(keyname, key) \
+	(global_tfp ? global_tfp->create_tls((keyname), &(key), __location__) : 0)
+
+#define SMB_THREAD_DESTROY_TLS(key) \
+	do { \
+		if (global_tfp) { \
+			global_tfp->destroy_tls(key); \
+		}; \
+	} while (0)
+
+#define SMB_THREAD_SET_TLS(key, val) \
+	(global_tfp ? global_tfp->set_tls((key),(val),__location__) : 0)
+
+#define SMB_THREAD_GET_TLS(key) \
+	(global_tfp ? global_tfp->get_tls((key), __location__) : NULL)
+
+#endif