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Make improvements to locking

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This change makes pthread_mutex_lock() as fast as _spinlock() by
default. Thread instability issues on NetBSD have been resolved.
Improvements made to gdtoa thread code. Crash reporting will now
synchronize between threads in a slightly better way.
This commit is contained in:
Justine Tunney 2022-06-19 01:13:03 -07:00
parent 25041b8026
commit d5312b60f7
60 changed files with 890 additions and 629 deletions
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68
libc/intrin/restoretty.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/struct/metatermios.internal.h"
#include "libc/calls/struct/termios.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/calls/termios.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/log/color.internal.h"
#include "libc/log/internal.h"
#include "libc/log/libfatal.internal.h"
#include "libc/runtime/internal.h"
#include "libc/sysv/consts/termios.h"
/**
* @fileoverview Terminal Restoration Helper for System Five.
*
* This is used by the crash reporting functions, e.g. __die(), to help
* ensure the terminal is in an unborked state after a crash happens.
*/
#define RESET_COLOR "\e[0m"
#define SHOW_CURSOR "\e[?25h"
#define DISABLE_MOUSE "\e[?1000;1002;1015;1006l"
#define ANSI_RESTORE RESET_COLOR SHOW_CURSOR DISABLE_MOUSE
static bool __isrestorable;
static union metatermios __oldtermios;
static textstartup void __oldtermios_init() {
int e;
e = errno;
if (sys_ioctl(0, TCGETS, &__oldtermios) != -1) {
__isrestorable = true;
}
errno = e;
}
const void *const __oldtermios_ctor[] initarray = {
__oldtermios_init,
};
void __restore_tty(void) {
int e;
if (__isrestorable && !__isworker && !__nocolor) {
e = errno;
sys_write(0, ANSI_RESTORE, __strlen(ANSI_RESTORE));
sys_ioctl(0, TCSETSF, &__oldtermios);
errno = e;
}
}