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cosmopolitan/libc/thread/thread.h
Justine Tunney f2af97711b
Make improvements 
- Improve compatibility with Blink virtual machine
- Add non-POSIX APIs for joining threads and signal masks
- Never ever use anything except 32-bit integers for atomics
- Add some `#undef` statements to workaround `ctags` problems
2022-11-10 21:52:47 -08:00

247 lines
10 KiB
C
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#ifndef COSMOPOLITAN_LIBC_THREAD_THREAD_H_
#define COSMOPOLITAN_LIBC_THREAD_THREAD_H_
#define PTHREAD_KEYS_MAX 128
#define PTHREAD_STACK_MIN FRAMESIZE
#define PTHREAD_DESTRUCTOR_ITERATIONS 4
#define PTHREAD_BARRIER_SERIAL_THREAD 31337
#define PTHREAD_MUTEX_DEFAULT 0
#define PTHREAD_MUTEX_NORMAL 0
#define PTHREAD_MUTEX_RECURSIVE 1
#define PTHREAD_MUTEX_ERRORCHECK 2
#define PTHREAD_MUTEX_STALLED 0
#define PTHREAD_MUTEX_ROBUST 1
#define PTHREAD_PROCESS_PRIVATE 0
#define PTHREAD_PROCESS_SHARED 1
#define PTHREAD_CREATE_JOINABLE 0
#define PTHREAD_CREATE_DETACHED 1
#define PTHREAD_INHERIT_SCHED 0
#define PTHREAD_EXPLICIT_SCHED 1
#define PTHREAD_CANCELED ((void *)-1)
#define PTHREAD_CANCEL_ENABLE 0
#define PTHREAD_CANCEL_DISABLE 1
#define PTHREAD_CANCEL_MASKED 2
#define PTHREAD_CANCEL_DEFERRED 0
#define PTHREAD_CANCEL_ASYNCHRONOUS 1
#define PTHREAD_SCOPE_SYSTEM 0
#define PTHREAD_SCOPE_PROCESS 1
#define PTHREAD_ATTR_NO_SIGMASK_NP -1
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
#define PTHREAD_ONCE_INIT _PTHREAD_INIT
#define PTHREAD_COND_INITIALIZER _PTHREAD_INIT
#define PTHREAD_RWLOCK_INITIALIZER _PTHREAD_INIT
#define PTHREAD_MUTEX_INITIALIZER _PTHREAD_INIT
#define _PTHREAD_INIT \
{ 0 }
typedef uintptr_t pthread_t;
typedef int pthread_id_np_t;
typedef char pthread_condattr_t;
typedef char pthread_rwlockattr_t;
typedef char pthread_barrierattr_t;
typedef unsigned pthread_key_t;
typedef void (*pthread_key_dtor)(void *);
typedef struct pthread_once_s {
_Atomic(uint32_t) _lock;
} pthread_once_t;
typedef struct pthread_spinlock_s {
_Atomic(int) _lock;
} pthread_spinlock_t;
typedef struct pthread_mutex_s {
_Atomic(int32_t) _lock;
unsigned _type : 2;
unsigned _pshared : 1;
unsigned _depth : 8;
unsigned _owner : 21;
long _pid;
} pthread_mutex_t;
typedef struct pthread_mutexattr_s {
char _type;
char _pshared;
} pthread_mutexattr_t;
typedef struct pthread_cond_s {
void *_nsync[2];
} pthread_cond_t;
typedef struct pthread_rwlock_s {
void *_nsync[2];
char _iswrite;
} pthread_rwlock_t;
typedef struct pthread_barrier_s {
void *_nsync;
} pthread_barrier_t;
typedef struct pthread_attr_s {
char __detachstate;
char __inheritsched;
char __havesigmask;
int __schedparam;
int __schedpolicy;
int __contentionscope;
unsigned __guardsize;
unsigned __stacksize;
uint32_t __sigmask[4];
char *__stackaddr;
} pthread_attr_t;
struct _pthread_cleanup_buffer {
void (*__routine)(void *);
void *__arg;
int __canceltype;
struct _pthread_cleanup_buffer *__prev;
};
/* clang-format off */
int pthread_atfork(void (*)(void), void (*)(void), void (*)(void));
int pthread_attr_destroy(pthread_attr_t *) paramsnonnull();
int pthread_attr_getdetachstate(const pthread_attr_t *, int *) paramsnonnull();
int pthread_attr_getguardsize(const pthread_attr_t *, size_t *) paramsnonnull();
int pthread_attr_getinheritsched(const pthread_attr_t *, int *) paramsnonnull();
int pthread_attr_getschedpolicy(const pthread_attr_t *, int *) paramsnonnull();
int pthread_attr_getscope(const pthread_attr_t *, int *) paramsnonnull();
int pthread_attr_getstack(const pthread_attr_t *, void **, size_t *) paramsnonnull();
int pthread_attr_getstacksize(const pthread_attr_t *, size_t *) paramsnonnull();
int pthread_attr_init(pthread_attr_t *) paramsnonnull();
int pthread_attr_setdetachstate(pthread_attr_t *, int) paramsnonnull();
int pthread_attr_setguardsize(pthread_attr_t *, size_t) paramsnonnull();
int pthread_attr_setinheritsched(pthread_attr_t *, int) paramsnonnull();
int pthread_attr_setschedpolicy(pthread_attr_t *, int) paramsnonnull();
int pthread_attr_setscope(pthread_attr_t *, int) paramsnonnull();
int pthread_attr_setstack(pthread_attr_t *, void *, size_t) paramsnonnull((1));
int pthread_attr_setstacksize(pthread_attr_t *, size_t) paramsnonnull();
int pthread_barrier_destroy(pthread_barrier_t *) paramsnonnull();
int pthread_barrier_init(pthread_barrier_t *, const pthread_barrierattr_t *, unsigned) paramsnonnull((1));
int pthread_barrier_wait(pthread_barrier_t *) paramsnonnull();
int pthread_barrierattr_destroy(pthread_barrierattr_t *) paramsnonnull();
int pthread_barrierattr_getpshared(const pthread_barrierattr_t *, int *) paramsnonnull();
int pthread_barrierattr_init(pthread_barrierattr_t *) paramsnonnull();
int pthread_barrierattr_setpshared(pthread_barrierattr_t *, int) paramsnonnull();
int pthread_cancel(pthread_t);
int pthread_cond_broadcast(pthread_cond_t *) paramsnonnull();
int pthread_cond_destroy(pthread_cond_t *) paramsnonnull();
int pthread_cond_init(pthread_cond_t *, const pthread_condattr_t *) paramsnonnull((1));
int pthread_cond_signal(pthread_cond_t *) paramsnonnull();
int pthread_cond_wait(pthread_cond_t *, pthread_mutex_t *) paramsnonnull();
int pthread_condattr_destroy(pthread_condattr_t *) paramsnonnull();
int pthread_condattr_getpshared(const pthread_condattr_t *, int *) paramsnonnull();
int pthread_condattr_init(pthread_condattr_t *) paramsnonnull();
int pthread_condattr_setpshared(pthread_condattr_t *, int) paramsnonnull();
int pthread_create(pthread_t *, const pthread_attr_t *, void *(*)(void *), void *) paramsnonnull((1, 3));
int pthread_detach(pthread_t);
int pthread_equal(pthread_t, pthread_t);
int pthread_getattr_np(pthread_t, pthread_attr_t *) paramsnonnull();
int pthread_getname_np(pthread_t, char *, size_t) paramsnonnull();
int pthread_getunique_np(pthread_t, pthread_id_np_t *) paramsnonnull();
int pthread_join(pthread_t, void **);
int pthread_key_create(pthread_key_t *, pthread_key_dtor) paramsnonnull((1));
int pthread_key_delete(pthread_key_t);
int pthread_kill(pthread_t, int);
int pthread_mutex_consistent(pthread_mutex_t *) paramsnonnull();
int pthread_mutex_destroy(pthread_mutex_t *) paramsnonnull();
int pthread_mutex_init(pthread_mutex_t *, const pthread_mutexattr_t *) paramsnonnull((1));
int pthread_mutex_lock(pthread_mutex_t *) paramsnonnull();
int pthread_mutex_trylock(pthread_mutex_t *) paramsnonnull();
int pthread_mutex_unlock(pthread_mutex_t *) paramsnonnull();
int pthread_mutexattr_destroy(pthread_mutexattr_t *) paramsnonnull();
int pthread_mutexattr_getpshared(const pthread_mutexattr_t *, int *) paramsnonnull();
int pthread_mutexattr_gettype(const pthread_mutexattr_t *, int *) paramsnonnull();
int pthread_mutexattr_init(pthread_mutexattr_t *) paramsnonnull();
int pthread_mutexattr_setpshared(pthread_mutexattr_t *, int) paramsnonnull();
int pthread_mutexattr_settype(pthread_mutexattr_t *, int) paramsnonnull();
int pthread_once(pthread_once_t *, void (*)(void)) paramsnonnull();
int pthread_orphan_np(void);
int pthread_print_np(int, const char *, ...);
int pthread_rwlock_destroy(pthread_rwlock_t *) paramsnonnull();
int pthread_rwlock_init(pthread_rwlock_t *, const pthread_rwlockattr_t *) paramsnonnull((1));
int pthread_rwlock_rdlock(pthread_rwlock_t *) paramsnonnull();
int pthread_rwlock_tryrdlock(pthread_rwlock_t *) paramsnonnull();
int pthread_rwlock_trywrlock(pthread_rwlock_t *) paramsnonnull();
int pthread_rwlock_unlock(pthread_rwlock_t *) paramsnonnull();
int pthread_rwlock_wrlock(pthread_rwlock_t *) paramsnonnull();
int pthread_rwlockattr_destroy(pthread_rwlockattr_t *) paramsnonnull();
int pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *, int *) paramsnonnull();
int pthread_rwlockattr_init(pthread_rwlockattr_t *) paramsnonnull();
int pthread_rwlockattr_setpshared(pthread_rwlockattr_t *, int) paramsnonnull();
int pthread_setcancelstate(int, int *);
int pthread_setcanceltype(int, int *);
int pthread_setname_np(pthread_t, const char *) paramsnonnull();
int pthread_setschedprio(pthread_t, int);
int pthread_setspecific(pthread_key_t, const void *);
int pthread_spin_destroy(pthread_spinlock_t *) paramsnonnull();
int pthread_spin_init(pthread_spinlock_t *, int) paramsnonnull();
int pthread_spin_lock(pthread_spinlock_t *) paramsnonnull();
int pthread_spin_trylock(pthread_spinlock_t *) paramsnonnull();
int pthread_spin_unlock(pthread_spinlock_t *) paramsnonnull();
int pthread_testcancel_np(void);
int pthread_tryjoin_np(pthread_t, void **);
int pthread_yield(void);
pthread_id_np_t pthread_getthreadid_np(void);
pthread_t pthread_self(void) pureconst;
void *pthread_getspecific(pthread_key_t);
void pthread_cleanup_pop(struct _pthread_cleanup_buffer *, int) paramsnonnull();
void pthread_cleanup_push(struct _pthread_cleanup_buffer *, void (*)(void *), void *) paramsnonnull((1));
void pthread_decimate_np(void);
void pthread_exit(void *) wontreturn;
void pthread_testcancel(void);
/* clang-format on */
#define pthread_cleanup_push(routine, arg) \
{ \
struct _pthread_cleanup_buffer _buffer; \
pthread_cleanup_push(&_buffer, (routine), (arg));
#define pthread_cleanup_pop(execute) \
pthread_cleanup_pop(&_buffer, (execute)); \
}
#if (__GNUC__ + 0) * 100 + (__GNUC_MINOR__ + 0) >= 407 && \
!defined(__STRICT_ANSI__) && !defined(MODE_DBG)
extern const errno_t EBUSY;
#define pthread_spin_lock(pSpin) \
({ \
pthread_spinlock_t *_s = pSpin; \
while (__atomic_test_and_set(&_s->_lock, __ATOMIC_ACQUIRE)) donothing; \
0; \
})
#define pthread_spin_unlock(pSpin) \
({ \
pthread_spinlock_t *_s = pSpin; \
__atomic_store_n(&_s->_lock, 0, __ATOMIC_RELEASE); \
0; \
})
#define pthread_spin_trylock(pSpin) \
({ \
pthread_spinlock_t *_s = pSpin; \
__atomic_test_and_set(&_s->_lock, __ATOMIC_ACQUIRE) ? EBUSY : 0; \
})
#define pthread_spin_init(pSpin, multiprocess) \
(__atomic_store_n(&(pSpin)->_lock, 0, __ATOMIC_RELAXED), 0)
#define pthread_spin_destroy(pSpin) \
(__atomic_store_n(&(pSpin)->_lock, -1, __ATOMIC_RELAXED), 0)
#endif /* GCC 4.7+ */
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_THREAD_THREAD_H_ */
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