C语言线程对象和线程存储的实现

#include <stdio.h>
#include <threads.h>
thread_local int var = 10;
void print_var(void){ printf("var = %d\n", var); }
int func(void *);        // 线程函数
int main(int argc, char *argv[])
{
  thrd_t th1;
  if ( thrd_create( &th1, func, NULL ) != thrd_success ){
   fprintf(stderr,"Error creating thread.\n"); return 0xff;
  }
  print_var();        // 输出：var = 10
  thrd_join(th1, NULL);
  return 0;
}
int func(void *arg)       // 线程函数
{
  var += 10;         // 线程本地变量
  print_var();        // 输出：var = 20
  return 0
}

int tss_create（tss_t*key，tss_dtor_t dtor）；

void tss_delete（tss_t key）；

int tss_set（tss_t key，void*val）；

void*tss_get（tss_t key）；

#include <threads.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
tss_t key;               // 用于TSS指针的全局键
int thFunc(void *arg);     // 线程函数
void destructor(void *data);  // 析构函数
int main(void)
{
  thrd_t th1, th2;
  int result1 = 0, result2 = 0;
  // 创建一个TSS密钥
  if (tss_create(&key, destructor) != thrd_success)
   return -1;
  // 创建线程
  if (thrd_create(&th1, thFunc, "Thread_1") != thrd_success
     || thrd_create(&th2, thFunc, "Thread_2") != thrd_success)
    return -2;
  thrd_join(th1, &result1); thrd_join(th2, &result2);
  if ( result1 != 0 || result2 != 0 )
    fputs("Thread error\n", stderr);
  else
    puts("Threads finished without error.");
  tss_delete(key);      // 释放TSS指针所有的资源
  return 0;
}
void print(void)        // 显示线程存储
{
 printf( "print: %s\n", (char*)tss_get(key) );
}
int thFunc( void *arg )
{
  char *name = (char*)arg;
  size_t size = strlen(name)+1;
  // 设置线程存储
  if ( tss_set(key, malloc(size)) != thrd_success )
   return -1;
  // 存储数据
  strcpy((char*)tss_get(key), name);
  print();
  return 0;
}
void destructor(void *data)
{
 printf("Destructor for %s\n", (char*)data);
 free(data);      // 释放内存
}