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Move code to handle loop wakeup and signals into its own module

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Kovid Goyal 2019-07-05 12:19:37 +05:30
parent 556992a117
commit 5dc4e79c8d
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4 changed files with 182 additions and 109 deletions
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49
kitty/loop-utils.h Normal file
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/*
* Copyright (C) 2019 Kovid Goyal <kovid at kovidgoyal.net>
*
* Distributed under terms of the GPL3 license.
*/
#pragma once
#include "data-types.h"
#include <fcntl.h>
#include <unistd.h>
typedef struct {
int wakeup_fds[2];
int signal_fds[2];
int wakeup_read_fd;
int signal_read_fd;
} LoopData;
typedef void(*handle_signal_func)(int, void *data);
bool init_loop_data(LoopData *ld);
void free_loop_data(LoopData *ld);
void wakeup_loop(LoopData *ld, bool in_signal_handler);
bool install_signal_handlers(LoopData *ld);
void read_signals(int fd, handle_signal_func callback, void *data);
static inline bool
self_pipe(int fds[2], bool nonblock) {
#ifdef __APPLE__
int flags;
flags = pipe(fds);
if (flags != 0) return false;
for (int i = 0; i < 2; i++) {
flags = fcntl(fds[i], F_GETFD);
if (flags == -1) { return false; }
if (fcntl(fds[i], F_SETFD, flags | FD_CLOEXEC) == -1) { return false; }
if (nonblock) {
flags = fcntl(fds[i], F_GETFL);
if (flags == -1) { return false; }
if (fcntl(fds[i], F_SETFL, flags | O_NONBLOCK) == -1) { return false; }
}
}
return true;
#else
int flags = O_CLOEXEC;
if (nonblock) flags |= O_NONBLOCK;
return pipe2(fds, flags) == 0;
#endif
}