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88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
#ifndef COSMOPOLITAN_LIBC_THREAD_POSIXTHREAD_INTERNAL_H_
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#define COSMOPOLITAN_LIBC_THREAD_POSIXTHREAD_INTERNAL_H_
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#include "libc/calls/struct/sched_param.h"
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#include "libc/runtime/runtime.h"
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#include "libc/thread/thread.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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/**
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* @fileoverview Cosmopolitan POSIX Thread Internals
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*/
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// LEGAL TRANSITIONS ┌──> TERMINATED
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// pthread_create ─┬─> JOINABLE ─┴┬─> DETACHED ──> ZOMBIE
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// └──────────────┘
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enum PosixThreadStatus {
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// this is a running thread that needs pthread_join()
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//
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// the following transitions are possible:
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//
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// - kPosixThreadJoinable -> kPosixThreadTerminated if start_routine()
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// returns, or is longjmp'd out of by pthread_exit(), and the thread
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// is waiting to be joined.
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//
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// - kPosixThreadJoinable -> kPosixThreadDetached if pthread_detach()
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// is called on this thread.
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kPosixThreadJoinable,
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// this is a managed thread that'll be cleaned up by the library.
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//
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// the following transitions are possible:
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//
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// - kPosixThreadDetached -> kPosixThreadZombie if start_routine()
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// returns, or is longjmp'd out of by pthread_exit(), and the thread
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// is waiting to be joined.
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kPosixThreadDetached,
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// this is a joinable thread that terminated.
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//
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// the following transitions are possible:
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//
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// - kPosixThreadTerminated -> _pthread_free() will happen when
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// pthread_join() is called by the user.
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kPosixThreadTerminated,
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// this is a detached thread that terminated.
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//
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// the following transitions are possible:
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//
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// - kPosixThreadZombie -> _pthread_free() will happen whenever
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// convenient, e.g. pthread_create() entry or atexit handler.
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kPosixThreadZombie,
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};
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struct PosixThread {
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void *(*start_routine)(void *);
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void *arg; // start_routine's parameter
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void *rc; // start_routine's return value
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bool ownstack;
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int tid;
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int *ctid;
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char *tls;
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char *tib;
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char *altstack;
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_Atomic(enum PosixThreadStatus) status;
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jmp_buf exiter;
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pthread_attr_t attr;
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};
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hidden extern pthread_spinlock_t _pthread_keys_lock;
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hidden extern uint64_t _pthread_key_usage[(PTHREAD_KEYS_MAX + 63) / 64];
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hidden extern pthread_key_dtor _pthread_key_dtor[PTHREAD_KEYS_MAX];
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hidden extern _Thread_local void *_pthread_keys[PTHREAD_KEYS_MAX];
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int _pthread_reschedule(struct PosixThread *) hidden;
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int _pthread_setschedparam_freebsd(int, int, const struct sched_param *) hidden;
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void _pthread_free(struct PosixThread *) hidden;
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void _pthread_ungarbage(void) hidden;
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void _pthread_wait(struct PosixThread *) hidden;
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void _pthread_zombies_add(struct PosixThread *) hidden;
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void _pthread_zombies_decimate(void) hidden;
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void _pthread_zombies_harvest(void) hidden;
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void _pthread_key_destruct(void *[PTHREAD_KEYS_MAX]);
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_THREAD_POSIXTHREAD_INTERNAL_H_ */
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