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cosmopolitan/libc/thread/semaphore.h

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Import nsync
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#ifndef COSMOPOLITAN_LIBC_CALLS_SEMAPHORE_H_
#define COSMOPOLITAN_LIBC_CALLS_SEMAPHORE_H_
Fix the build
2022-09-11 02:57:50 +00:00
#include "libc/calls/struct/timespec.h"
Import nsync
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COSMOPOLITAN_C_START_
Implement pthread_atfork() If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
2022-10-16 19:05:08 +00:00
#define SEM_FAILED ((sem_t *)0)
#define SEM_MAGIC_NAMED 0xDEADBEEFu
#define SEM_MAGIC_UNNAMED 0xFEEDABEEu
Fix some issues
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#define SEM_MAGIC_KERNEL 0xCAFEBABEu
Import nsync
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typedef struct {
Add posix semaphores support There's still some bugs to work out on Windows and OpenBSD.
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union {
struct {
_Atomic(int) sem_value;
Implement pthread_atfork() If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
2022-10-16 19:05:08 +00:00
_Atomic(int) sem_waiters;
_Atomic(int) sem_prefs; /* named only */
unsigned sem_magic;
int64_t sem_dev; /* named only */
int64_t sem_ino; /* named only */
int sem_pid; /* unnamed only */
Remove bool from public headers
2023-11-16 04:57:18 +00:00
char sem_lazydelete; /* named only */
char sem_pshared;
Fix some issues
2023-10-10 03:18:48 +00:00
int *sem_kernel;
Add posix semaphores support There's still some bugs to work out on Windows and OpenBSD.
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};
void *sem_space[32];
};
Import nsync
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} sem_t;
Add `dontthrow` attribute to most libc functions This will help C++ code that uses exceptions to be tinier. For example, this change shaves away 1000 lines of assembly code from LLVM's libcxx, which is 0.7% of all assembly instructions in the entire library.
2024-01-09 09:26:03 +00:00
int sem_init(sem_t *, int, unsigned) libcesque;
int sem_destroy(sem_t *) libcesque;
int sem_post(sem_t *) libcesque;
int sem_wait(sem_t *) libcesque;
int sem_trywait(sem_t *) libcesque;
int sem_timedwait(sem_t *, const struct timespec *) libcesque;
int sem_getvalue(sem_t *, int *) libcesque;
sem_t *sem_open(const char *, int, ...) libcesque;
int sem_close(sem_t *) libcesque;
int sem_unlink(const char *) libcesque;
Import nsync
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COSMOPOLITAN_C_END_
#endif /* COSMOPOLITAN_LIBC_CALLS_SEMAPHORE_H_ */
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