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add thread local storage feature.

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git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1049 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong@gmail.com
2010-11-15 15:36:54 +00:00
parent aca1628a31
commit 1c67fc851a
4 changed files with 193 additions and 60 deletions
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93
components/pthreads/pthread.c
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@@ -1,41 +1,18 @@
#include "pthread.h"
#define PTHREAD_MAGIC 0x70746873
struct _pthread_data
{
rt_uint32_t magic;
pthread_attr_t attr;
rt_thread_t tid;
void* (*thread_entry)(void* parameter);
void* thread_parameter;
/* return value */
void* return_value;
/* semaphore for joinable thread */
rt_sem_t joinable_sem;
void** tls; /* thread-local storage area */
};
typedef struct _pthread_data _pthread_data_t;
rt_inline _pthread_data_t* get_pthread_data(pthread_t thread)
{
RT_ASSERT(thread != RT_NULL);
return (_pthread_data_t*)thread->user_data;
}
#include <pthread.h>
#include "pthread_internal.h"
int pthread_system_init(void)
{
/* initialize key area */
pthread_key_system_init();
return 0;
}
static void _pthread_cleanup(rt_thread_t tid)
{
_pthread_data_t *ptd;
ptd = get_pthread_data(tid);
ptd = _pthread_get_data(tid);
/* clear cleanup function */
tid->cleanup = RT_NULL;
@@ -75,10 +52,10 @@ int pthread_create (pthread_t *tid, const pthread_attr_t *attr,
/* tid shall be provided */
RT_ASSERT(tid != RT_NULL);
/* allocate pthread data */
/* allocate posix thread data */
ptd = (_pthread_data_t*)rt_malloc(sizeof(_pthread_data_t));
if (ptd == RT_NULL) return ENOMEM;
/* clean memory */
/* clean posix thread data memory */
rt_memset(ptd, 0, sizeof(_pthread_data_t));
if (attr != RT_NULL) ptd->attr = *attr;
@@ -161,7 +138,7 @@ int pthread_detach(pthread_t thread)
{
_pthread_data_t* ptd;
ptd = get_pthread_data(thread);
ptd = _pthread_get_data(thread);
if (thread->stat == RT_THREAD_CLOSE)
{
@@ -177,6 +154,12 @@ int pthread_detach(pthread_t thread)
/* release thread allocated stack */
rt_free(ptd->tid->stack_addr);
}
/*
* if this thread create the local thread data,
* delete it
*/
if (ptd->tls != RT_NULL) rt_free(ptd->tls);
rt_free(ptd->tid);
rt_free(ptd);
}
@@ -205,7 +188,7 @@ int pthread_join (pthread_t thread, void **value_ptr)
return EDEADLK;
}
ptd = get_pthread_data(thread);
ptd = _pthread_get_data(thread);
if (ptd->attr.detachstate == PTHREAD_CREATE_DETACHED)
return EINVAL; /* join on a detached pthread */
@@ -225,7 +208,7 @@ int pthread_cancel (pthread_t thread)
{
_pthread_data_t* ptd;
ptd = get_pthread_data(thread);
ptd = _pthread_get_data(thread);
/* check cancel point */
}
@@ -234,7 +217,7 @@ void pthread_exit (void* value)
{
_pthread_data_t* ptd;
ptd = get_pthread_data(rt_thread_self());
ptd = _pthread_get_data(rt_thread_self());
/* set return value */
ptd->return_value = value;
@@ -281,10 +264,50 @@ int pthread_kill(pthread_t thread, int sig)
void pthread_cleanup_pop(int execute)
{
_pthread_data_t* ptd;
_pthread_cleanup_t* cleanup;
/* get posix thread data */
ptd = _pthread_get_data(rt_thread_self());
RT_ASSERT(ptd != RT_NULL);
if (execute)
{
rt_enter_critical();
cleanup = ptd->cleanup;
if (cleanup)
ptd->cleanup = cleanup->next;
rt_exit_critical();
if (cleanup)
{
cleanup->cleanup_func(cleanup->parameter);
rt_free(cleanup);
}
}
}
void pthread_cleanup_push(void (*routine)(void*), void *arg)
{
_pthread_data_t* ptd;
_pthread_cleanup_t* cleanup;
/* get posix thread data */
ptd = _pthread_get_data(rt_thread_self());
RT_ASSERT(ptd != RT_NULL);
cleanup = (_pthread_cleanup_t*)rt_malloc(sizeof(_pthread_cleanup_t));
if (cleanup != RT_NULL)
{
cleanup->cleanup_func = routine;
cleanup->parameter = arg;
rt_enter_critical();
cleanup->next = ptd->cleanup;
ptd->cleanup = cleanup;
rt_exit_critical();
}
}
int pthread_setcancelstate(int state, int *oldstate)