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Add posix semaphores support

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There's still some bugs to work out on Windows and OpenBSD.
This commit is contained in:
Justine Tunney 2022-10-14 08:25:47 -07:00
parent f52f65b2e3
commit 8111462789
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GPG key ID: BE714B4575D6E328
36 changed files with 779 additions and 59 deletions
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3
libc/calls/openat.c
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@ -133,7 +133,8 @@
* @raise ENOENT if `file` doesn't exist when `O_CREAT` isn't in `flags`
* @raise ENOENT if `file` points to a string that's empty
* @raise ENOMEM if insufficient memory was available
* @raise EMFILE if `RLIMIT_NOFILE` has been reached
* @raise EMFILE if process `RLIMIT_NOFILE` has been reached
* @raise ENFILE if system-wide file limit has been reached
* @raise EOPNOTSUPP if `file` names a named socket
* @raise EFAULT if `file` points to invalid memory
* @raise ETXTBSY if writing is requested on `file` that's being executed

26
libc/calls/semaphore.internal.h
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@ -1,26 +0,0 @@
#ifndef COSMOPOLITAN_LIBC_CALLS_SEMAPHORE_H_
#define COSMOPOLITAN_LIBC_CALLS_SEMAPHORE_H_
#include "libc/calls/struct/timespec.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
#define SEM_FAILED ((sem_t *)0)
typedef struct {
volatile int __val[4 * sizeof(long) / sizeof(int)];
} sem_t;
int sem_close(sem_t *);
int sem_destroy(sem_t *);
int sem_getvalue(sem_t *, int *);
int sem_init(sem_t *, int, unsigned);
sem_t *sem_open(const char *, int, ...);
int sem_post(sem_t *);
int sem_timedwait(sem_t *, const struct timespec *);
int sem_trywait(sem_t *);
int sem_unlink(const char *);
int sem_wait(sem_t *);
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_CALLS_SEMAPHORE_H_ */

1
libc/calls/unlinkat-nt.c
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@ -24,6 +24,7 @@
#include "libc/nt/enum/fileflagandattributes.h"
#include "libc/nt/enum/filesharemode.h"
#include "libc/nt/enum/io.h"
#include "libc/nt/enum/movefileexflags.h"
#include "libc/nt/errors.h"
#include "libc/nt/files.h"
#include "libc/nt/runtime.h"