mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 03:27:39 +00:00
046c7ebd4a
- Introduce fast spinlock API - Double rand64() perf w/ spinlock - Improve raise() on New Technology - Support gettid() across platforms - Implement SA_NODEFER on New Technology - Move the lock intrinsics into LIBC_INTRIN - Make SIGTRAP recoverable on New Technology - Block SIGCHLD in wait4() on New Technology - Add threading prototypes for XNU and FreeBSD - Rewrite abort() fixing its minor bugs on XNU/NT - Shave down a lot of the content in libc/bits/bits.h - Let signal handlers modify CPU registers on New Technology
78 lines
3.1 KiB
C
78 lines
3.1 KiB
C
/*-*- 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 2020 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/dce.h"
|
|
#include "libc/nt/thread.h"
|
|
|
|
/**
|
|
* Returns current thread id.
|
|
* @asyncsignalsafe
|
|
*/
|
|
int gettid(void) {
|
|
int rc;
|
|
int64_t wut;
|
|
|
|
if (IsLinux()) {
|
|
asm("syscall"
|
|
: "=a"(rc) // man says always succeeds
|
|
: "0"(186) // __NR_gettid
|
|
: "rcx", "r11", "memory");
|
|
return rc;
|
|
}
|
|
|
|
if (IsXnu()) {
|
|
asm("syscall" // xnu/osfmk/kern/ipc_tt.c
|
|
: "=a"(rc) // assume success
|
|
: "0"(0x1000000 | 27) // Mach thread_self_trap()
|
|
: "rcx", "r11", "memory", "cc");
|
|
return rc;
|
|
}
|
|
|
|
if (IsOpenbsd()) {
|
|
asm("syscall"
|
|
: "=a"(rc) // man says always succeeds
|
|
: "0"(299) // getthrid()
|
|
: "rcx", "r11", "memory", "cc");
|
|
return rc;
|
|
}
|
|
|
|
if (IsNetbsd()) {
|
|
asm("syscall"
|
|
: "=a"(rc) // man says always succeeds
|
|
: "0"(311) // _lwp_self()
|
|
: "rcx", "r11", "memory", "cc");
|
|
return rc;
|
|
}
|
|
|
|
if (IsFreebsd()) {
|
|
asm("syscall"
|
|
: "=a"(rc), // only fails w/ EFAULT, which isn't possible
|
|
"=m"(wut) // must be 64-bit
|
|
: "0"(432), // thr_self()
|
|
"D"(&wut) // but not actually 64-bit
|
|
: "rcx", "r11", "memory", "cc");
|
|
return wut; // narrowing intentional
|
|
}
|
|
|
|
if (IsWindows()) {
|
|
return GetCurrentThreadId();
|
|
}
|
|
|
|
return getpid();
|
|
}
|