musl/src/network/accept.c

#include <sys/socket.h>
#include "syscall.h"
#include "libc.h"

int accept(int fd, struct sockaddr *restrict addr, socklen_t *restrict len)
{
	return socketcall_cp(accept, fd, addr, len, 0, 0, 0);
}
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`#include <sys/socket.h>`
			`#include "syscall.h"`
			`#include "libc.h"`

use restrict everywhere it's required by c99 and/or posix 2008 to deal with the fact that the public headers may be used with pre-c99 compilers, __restrict is used in place of restrict, and defined appropriately for any supported compiler. we also avoid the form [restrict] since older versions of gcc rejected it due to a bug in the original c99 standard, and instead use the form *restrict. 2012-09-06 22:44:55 -04:00			`int accept(int fd, struct sockaddr restrict addr, socklen_t restrict len)`
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`{`
overhaul pthread cancellation this patch improves the correctness, simplicity, and size of cancellation-related code. modulo any small errors, it should now be completely conformant, safe, and resource-leak free. the notion of entering and exiting cancellation-point context has been completely eliminated and replaced with alternative syscall assembly code for cancellable syscalls. the assembly is responsible for setting up execution context information (stack pointer and address of the syscall instruction) which the cancellation signal handler can use to determine whether the interrupted code was in a cancellable state. these changes eliminate race conditions in the previous generation of cancellation handling code (whereby a cancellation request received just prior to the syscall would not be processed, leaving the syscall to block, potentially indefinitely), and remedy an issue where non-cancellable syscalls made from signal handlers became cancellable if the signal handler interrupted a cancellation point. x86_64 asm is untested and may need a second try to get it right. 2011-04-17 11:43:03 -04:00			`return socketcall_cp(accept, fd, addr, len, 0, 0, 0);`
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`}`