From e5702da72c752e913ff869bce341ca9799d10974 Mon Sep 17 00:00:00 2001 From: Jeremy Allison Date: Wed, 8 Apr 2009 15:46:49 -0700 Subject: [PATCH] Add the thread functions to top level lib/util. Not yet used, that's the next step. Jeremy. --- lib/util/smb_threads.c | 105 ++++++++++++++++++++++++++++ lib/util/smb_threads.h | 120 ++++++++++++++++++++++++++++++++ lib/util/smb_threads_internal.h | 52 ++++++++++++++ 3 files changed, 277 insertions(+) create mode 100644 lib/util/smb_threads.c create mode 100644 lib/util/smb_threads.h create mode 100644 lib/util/smb_threads_internal.h diff --git a/lib/util/smb_threads.c b/lib/util/smb_threads.c new file mode 100644 index 00000000000..84dec4d874a --- /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 . +*/ + +/* + * 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 + +#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 00000000000..2ca163be9a7 --- /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 . +*/ + +#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 00000000000..3208bc27e13 --- /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 . +*/ + +#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 -- 2.34.1