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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.
55 lines
2.7 KiB
ArmAsm
55 lines
2.7 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 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/dce.h"
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#include "libc/sysv/consts/nr.h"
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#include "libc/macros.internal.h"
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.privileged
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// Asks kernel to let other threads be scheduled.
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//
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// @return 0 on success, or -1 w/ errno
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sched_yield:
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push %rbp
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mov %rsp,%rbp
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testb IsWindows()
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jnz 1f
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// UNIX Support
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mov __NR_sched_yield,%eax
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syscall
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jmp 2f
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// Windows Support
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//
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// A value of zero, together with the bAlertable parameter set to
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// FALSE, causes the thread to relinquish the remainder of its time
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// slice to any other thread that is ready to run, if there are no
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// pending user APCs on the calling thread. If there are no other
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// threads ready to run and no user APCs are queued, the function
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// returns immediately, and the thread continues execution.
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// ──Quoth MSDN
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1: xor %ecx,%ecx
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xor %edx,%edx
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ntcall __imp_SleepEx
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xor %eax,%eax
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2: pop %rbp
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ret
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.endfn sched_yield,globl
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.previous
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