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-rw-r--r--lib/util/smb_threads.h137
1 files changed, 137 insertions, 0 deletions
diff --git a/lib/util/smb_threads.h b/lib/util/smb_threads.h
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+++ b/lib/util/smb_threads.h
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+/*
+ 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_
+
+typedef bool smb_thread_once_t;
+#define SMB_THREAD_ONCE_INIT false
+
+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,
+ int 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);
+};
+
+int smb_thread_set_functions(const struct smb_thread_functions *tf);
+int smb_thread_once(smb_thread_once_t *ponce,
+ void (*init_fn)(void *pdata),
+ void *pdata);
+
+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, int 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; \
+ pkey = (pthread_key_t *)malloc(sizeof(pthread_key_t)); \
+ if (!pkey) { \
+ return ENOMEM; \
+ } \
+ ret = pthread_key_create(pkey, NULL); \
+ if (ret) { \
+ free(pkey); \
+ return ret; \
+ } \
+ *ppkey = (void *)pkey; \
+ return 0; \
+} \
+ \
+static void smb_destroy_tls_pthread(void **ppkey, const char *location) \
+{ \
+ if (*ppkey) { \
+ pthread_key_delete(*(pthread_key_t *)ppkey); \
+ free(*ppkey); \
+ *ppkey = NULL; \
+ } \
+} \
+ \
+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) \
+{ \
+ if (pkey == NULL) { \
+ return NULL; \
+ } \
+ 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