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Introduce interprocess signaling on Windows

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This change gets rsync working without any warning or errors. On Windows
we now create a bunch of C:\var\sig\x\y.pid shared memory files, so sigs
can be delivered between processes. WinMain() creates this file when the
process starts. If the program links signaling system calls then we make
a thread at startup too, which allows asynchronous delivery each quantum
and cancelation points can spot these signals potentially faster on wait

See #1240
This commit is contained in:
Justine Tunney 2024-09-19 03:02:13 -07:00
parent 8527462b95
commit 0d74673213
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GPG key ID: BE714B4575D6E328
22 changed files with 302 additions and 62 deletions
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18
libc/nt/kernel32/SetFilePointer.S Normal file
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#include "libc/nt/codegen.h"
.imp kernel32,__imp_SetFilePointer,SetFilePointer
.text.windows
.ftrace1
SetFilePointer:
.ftrace2
#ifdef __x86_64__
push %rbp
mov %rsp,%rbp
mov __imp_SetFilePointer(%rip),%rax
jmp __sysv2nt
#elif defined(__aarch64__)
mov x0,#0
ret
#endif
.endfn SetFilePointer,globl
.previous