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088906b064
- Create separate macros for lock and unlock so that it's easier to identify which request is being made. - Initialize *ponce in the SMB_THREAD_ONCE macro in the non-thread-safe case, rather than requiring each init function to determine if it's in the non-thread-safe case and manually initialize. Derrell
135 lines
3.7 KiB
C
135 lines
3.7 KiB
C
/*
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Unix SMB/CIFS implementation.
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SMB thread interface functions.
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Copyright (C) Jeremy Allison, 2009.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _smb_threads_h_
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#define _smb_threads_h_
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typedef bool smb_thread_once_t;
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#define SMB_THREAD_ONCE_INIT false
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enum smb_thread_lock_type {
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SMB_THREAD_LOCK = 1,
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SMB_THREAD_UNLOCK
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};
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struct smb_thread_functions {
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/* Mutex and tls functions. */
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int (*create_mutex)(const char *lockname,
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void **pplock,
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const char *location);
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void (*destroy_mutex)(void *plock,
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const char *location);
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int (*lock_mutex)(void *plock,
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int lock_type,
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const char *location);
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/* Thread local storage. */
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int (*create_tls)(const char *keyname,
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void **ppkey,
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const char *location);
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void (*destroy_tls)(void **pkey,
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const char *location);
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int (*set_tls)(void *pkey, const void *pval, const char *location);
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void *(*get_tls)(void *pkey, const char *location);
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};
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int smb_thread_set_functions(const struct smb_thread_functions *tf);
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int smb_thread_once(smb_thread_once_t *ponce,
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void (*init_fn)(void *pdata),
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void *pdata);
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extern const struct smb_thread_functions *global_tfp;
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/* Define the pthread version of the functions. */
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#define SMB_THREADS_DEF_PTHREAD_IMPLEMENTATION(tf) \
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\
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static int smb_create_mutex_pthread(const char *lockname, void **pplock, const char *location) \
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{ \
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pthread_mutex_t *pmut = (pthread_mutex_t *)malloc(sizeof(pthread_mutex_t)); \
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if (!pmut) { \
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return ENOMEM; \
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} \
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pthread_mutex_init(pmut, NULL); \
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*pplock = (void *)pmut; \
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return 0; \
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} \
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\
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static void smb_destroy_mutex_pthread(void *plock, const char *location) \
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{ \
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pthread_mutex_destroy((pthread_mutex_t *)plock); \
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free(plock); \
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} \
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\
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static int smb_lock_pthread(void *plock, int lock_type, const char *location) \
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{ \
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if (lock_type == SMB_THREAD_UNLOCK) { \
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return pthread_mutex_unlock((pthread_mutex_t *)plock); \
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} else { \
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return pthread_mutex_lock((pthread_mutex_t *)plock); \
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} \
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} \
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\
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static int smb_create_tls_pthread(const char *keyname, void **ppkey, const char *location) \
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{ \
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int ret; \
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pthread_key_t *pkey; \
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pkey = (pthread_key_t *)malloc(sizeof(pthread_key_t)); \
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if (!pkey) { \
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return ENOMEM; \
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} \
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ret = pthread_key_create(pkey, NULL); \
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if (ret) { \
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free(pkey); \
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return ret; \
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} \
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*ppkey = (void *)pkey; \
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return 0; \
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} \
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\
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static void smb_destroy_tls_pthread(void **ppkey, const char *location) \
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{ \
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if (*ppkey) { \
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pthread_key_delete(*(pthread_key_t *)ppkey); \
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free(*ppkey); \
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*ppkey = NULL; \
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} \
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} \
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\
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static int smb_set_tls_pthread(void *pkey, const void *pval, const char *location) \
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{ \
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return pthread_setspecific(*(pthread_key_t *)pkey, pval); \
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} \
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\
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static void *smb_get_tls_pthread(void *pkey, const char *location) \
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{ \
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return pthread_getspecific(*(pthread_key_t *)pkey); \
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} \
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\
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static const struct smb_thread_functions (tf) = { \
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smb_create_mutex_pthread, \
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smb_destroy_mutex_pthread, \
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smb_lock_pthread, \
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smb_create_tls_pthread, \
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smb_destroy_tls_pthread, \
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smb_set_tls_pthread, \
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smb_get_tls_pthread }
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#endif
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