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https://github.com/jart/cosmopolitan.git
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7838edae88
The greenbean web server now works nearly perfectly on Windows with over 1000 threads. But some synchronization issues still remain which prevent us from going over nine thousand.
91 lines
3.5 KiB
C
91 lines
3.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/dce.h"
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#include "libc/nexgen32e/threaded.h"
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#include "libc/nt/thread.h"
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#include "libc/nt/thunk/msabi.h"
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#include "libc/runtime/internal.h"
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__msabi extern typeof(GetCurrentThreadId) *const __imp_GetCurrentThreadId;
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/**
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* Returns current thread id.
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* @asyncsignalsafe
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*/
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privileged int gettid(void) {
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int rc;
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int64_t wut;
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struct WinThread *wt;
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if (__tls_enabled) {
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rc = *(int *)(__get_tls() + 0x38);
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if (rc && rc != -1) {
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return rc;
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}
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}
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if (IsWindows()) {
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return __imp_GetCurrentThreadId();
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}
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if (IsLinux()) {
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asm("syscall"
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: "=a"(rc) // man says always succeeds
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: "0"(186) // __NR_gettid
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: "rcx", "r11", "memory");
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return rc;
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}
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if (IsXnu()) {
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asm("syscall" // xnu/osfmk/kern/ipc_tt.c
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: "=a"(rc) // assume success
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: "0"(0x1000000 | 27) // Mach thread_self_trap()
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: "rcx", "r11", "memory", "cc");
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return rc;
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}
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if (IsOpenbsd()) {
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asm("syscall"
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: "=a"(rc) // man says always succeeds
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: "0"(299) // getthrid()
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: "rcx", "r11", "memory", "cc");
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return rc;
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}
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if (IsNetbsd()) {
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asm("syscall"
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: "=a"(rc) // man says always succeeds
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: "0"(311) // _lwp_self()
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: "rcx", "rdx", "r11", "memory", "cc");
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return rc;
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}
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if (IsFreebsd()) {
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asm("syscall"
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: "=a"(rc), // only fails w/ EFAULT, which isn't possible
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"=m"(wut) // must be 64-bit
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: "0"(432), // thr_self()
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"D"(&wut) // but not actually 64-bit
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: "rcx", "r11", "memory", "cc");
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return wut; // narrowing intentional
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}
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return __pid;
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}
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