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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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8
libc/calls/sig.internal.h
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@ -1,5 +1,6 @@
#ifndef COSMOPOLITAN_LIBC_CALLS_SIGNALS_INTERNAL_H_
#define COSMOPOLITAN_LIBC_CALLS_SIGNALS_INTERNAL_H_
#include "libc/atomic.h"
#include "libc/calls/struct/sigset.h"
#include "libc/thread/posixthread.internal.h"
@ -9,8 +10,8 @@
COSMOPOLITAN_C_START_
struct Signals {
_Atomic(uint64_t) pending;
_Atomic(uint64_t) count;
atomic_ulong *process;
atomic_ulong count;
};
extern struct Signals __sig;
@ -27,5 +28,8 @@ void __sig_delete(int);
void __sig_generate(int, int);
void __sig_init(void);
char16_t *__sig_process_path(char16_t *, uint32_t);
atomic_ulong *__sig_map_process(int);
COSMOPOLITAN_C_END_
#endif /* COSMOPOLITAN_LIBC_CALLS_SIGNALS_INTERNAL_H_ */