thrd_exit.c

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#include <stdatomic.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/proc.h>
#include <threads.h>
 
#include "user/common/syscalls.h"
#include "user/common/thread.h"
 
void thrd_exit(int res)
{
    _thread_t* thread = _thread_get(gettid());
    if (thread == NULL)
    {
        fprintf(stderr, "libstd: thrd_exit called from unknown thread\n");
        abort();
    }
 
    thread->result = res;
 
    uint64_t state = atomic_exchange(&thread->state, _THREAD_EXITED);
    if (state == _THREAD_DETACHED)
    {
        _thread_free(thread);
    }
    else
    {
        futex(&thread->state, FUTEX_ALL, FUTEX_WAKE, CLOCKS_NEVER);
    }
 
    _syscall_thread_exit();
}