add thread local storage feature.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1049 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/pthreads/pthread_internal.h

@@ -0,0 +1,44 @@
+#ifndef __PTHREAD_INTERNAL_H__
+#define __PTHREAD_INTERNAL_H__
+
+#include <rtthread.h>
+#include <pthread.h>
+
+struct _pthread_cleanup
+{
+	void (*cleanup_func)(void* parameter);
+	void* parameter;
+
+	struct _pthread_cleanup* next;
+};
+typedef struct _pthread_cleanup _pthread_cleanup_t;
+
+#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;
+
+	_pthread_cleanup_t* cleanup;
+	void** tls; /* thread-local storage area */
+};
+typedef struct _pthread_data _pthread_data_t;
+
+rt_inline _pthread_data_t* _pthread_get_data(pthread_t thread)
+{
+	RT_ASSERT(thread != RT_NULL);
+
+	return (_pthread_data_t*)thread->user_data;
+}
+
+#endif