nsz Git - musl/blob - src/process/fork.c

   1 #include <unistd.h>
   2 #include "syscall.h"
   3 #include "libc.h"
   4 #include "pthread_impl.h"
   5
   6 static void dummy(int x)
   7 {
   8 }
   9
  10 weak_alias(dummy, __fork_handler);
  11
  12 pid_t fork(void)
  13 {
  14         pid_t ret;
  15         __fork_handler(-1);
  16         ret = syscall(SYS_fork);
  17         if (libc.main_thread && !ret) {
  18                 pthread_t self = __pthread_self();
  19                 self->tid = self->pid = syscall(SYS_getpid);
  20                 memset(&self->robust_list, 0, sizeof self->robust_list);
  21                 libc.threads_minus_1 = 0;
  22                 libc.main_thread = self;
  23         }
  24         __fork_handler(!ret);
  25         return ret;
  26 }