[wasi-libc.git] / libc-top-half / musl / src / process / fork.c

#include <unistd.h>
#include <string.h>
#include <signal.h>
#include "syscall.h"
#include "libc.h"
#include "pthread_impl.h"

static void dummy(int x)
{
}

weak_alias(dummy, __fork_handler);

pid_t fork(void)
{
	pid_t ret;
	sigset_t set;
	__fork_handler(-1);
	__block_all_sigs(&set);
#ifdef SYS_fork
	ret = __syscall(SYS_fork);
#else
	ret = __syscall(SYS_clone, SIGCHLD, 0);
#endif
	if (!ret) {
		pthread_t self = __pthread_self();
		self->tid = __syscall(SYS_gettid);
		self->robust_list.off = 0;
		self->robust_list.pending = 0;
		self->next = self->prev = self;
		__thread_list_lock = 0;
		libc.threads_minus_1 = 0;
	}
	__restore_sigs(&set);
	__fork_handler(!ret);
	return __syscall_ret(ret);
}
Commit	Line	Data
320054e8 DG	1	#include <unistd.h>
	2	#include <string.h>
	3	#include <signal.h>
	4	#include "syscall.h"
	5	#include "libc.h"
	6	#include "pthread_impl.h"
	7
	8	static void dummy(int x)
	9	{
	10	}
	11
	12	weak_alias(dummy, __fork_handler);
	13
	14	pid_t fork(void)
	15	{
	16	pid_t ret;
	17	sigset_t set;
	18	__fork_handler(-1);
	19	__block_all_sigs(&set);
	20	#ifdef SYS_fork
	21	ret = __syscall(SYS_fork);
	22	#else
	23	ret = __syscall(SYS_clone, SIGCHLD, 0);
	24	#endif
	25	if (!ret) {
	26	pthread_t self = __pthread_self();
	27	self->tid = __syscall(SYS_gettid);
	28	self->robust_list.off = 0;
	29	self->robust_list.pending = 0;
f41256b6	30	self->next = self->prev = self;
d4db3fa2	31	__thread_list_lock = 0;
320054e8 DG	32	libc.threads_minus_1 = 0;
	33	}
	34	__restore_sigs(&set);
	35	__fork_handler(!ret);
	36	return __syscall_ret(ret);
	37	}