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Add the thread functions to top level lib/util.

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Not yet used, that's the next step.
Jeremy.
This commit is contained in:
Jeremy Allison 2009-04-08 15:46:49 -07:00
parent d8a6ea8141
commit e5702da72c
3 changed files with 277 additions and 0 deletions
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105
lib/util/smb_threads.c Normal file
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/*
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

120
lib/util/smb_threads.h Normal file
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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_
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

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lib/util/smb_threads_internal.h Normal file
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/*
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