os2/pthread.c

#include "pthread.h"


/*
*    pthread.c
*
*    POSIX threads library based on linux-0.11
*
*    Copyright (C) 2008  All rights reserved.
*
*    这个里面没有写多少注释，都是很简单的
*/

_syscall2(int, create_thread, unsigned long, start, void*, arg);
_syscall2(int, syspthread_join, pthread_t, thread, void*, value_ptr);
_syscall1(int, endthread, int, value);

int pthread_attr_init(pthread_attr_t* attr) /*这个实验没有必要用到这个初始化函数*/
{
    ;;;;;
    return 0;
}
int pthread_create(pthread_t* thread, const pthread_attr_t* attr, void* (*start)(void*), void* arg)
{
    int id = 0;
    if (!thread) return EINVAL;

    id = create_thread((unsigned long)start, (int*)arg);

    /*printf("here after create_thread!\n");*/
    /*stop: goto stop;*/
    if (id < 0) return errno;
    *thread = id;
    return id;
}

void pthread_exit(void* value_ptr)
{
    endthread((int)value_ptr);
}
int pthread_join(pthread_t thread, void** value_ptr)
{
    syspthread_join(thread, value_ptr);
    return 0;
}