diff options
Diffstat (limited to 'libc-top-half/musl/src/internal/pthread_impl.h')
| -rw-r--r-- | libc-top-half/musl/src/internal/pthread_impl.h | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/internal/pthread_impl.h b/libc-top-half/musl/src/internal/pthread_impl.h new file mode 100644 index 0000000..a6d188b --- /dev/null +++ b/libc-top-half/musl/src/internal/pthread_impl.h @@ -0,0 +1,226 @@ +#ifndef _PTHREAD_IMPL_H +#define _PTHREAD_IMPL_H + +#include <pthread.h> +#ifdef __wasilibc_unmodified_upstream +#include <signal.h> +#endif +#include <errno.h> +#include <limits.h> +#ifdef __wasilibc_unmodified_upstream +#include <sys/mman.h> +#endif +#include "libc.h" +#ifdef __wasilibc_unmodified_upstream +#include "syscall.h" +#endif +#include "atomic.h" +#include "futex.h" + +#include "pthread_arch.h" + +#define pthread __pthread + +struct pthread { + /* Part 1 -- these fields may be external or + * internal (accessed via asm) ABI. Do not change. */ + struct pthread *self; +#ifdef __wasilibc_unmodified_upstream +#ifndef TLS_ABOVE_TP + uintptr_t *dtv; +#endif +#endif + struct pthread *prev, *next; /* non-ABI */ + uintptr_t sysinfo; +#ifndef TLS_ABOVE_TP +#ifdef CANARY_PAD + uintptr_t canary_pad; +#endif + uintptr_t canary; +#endif + + /* Part 2 -- implementation details, non-ABI. */ + int tid; + int errno_val; + volatile int detach_state; + volatile int cancel; + volatile unsigned char canceldisable, cancelasync; + unsigned char tsd_used:1; + unsigned char dlerror_flag:1; + unsigned char *map_base; + size_t map_size; + void *stack; + size_t stack_size; + size_t guard_size; + void *result; + struct __ptcb *cancelbuf; + void **tsd; + struct { + volatile void *volatile head; + long off; + volatile void *volatile pending; + } robust_list; + int h_errno_val; + volatile int timer_id; + locale_t locale; + volatile int killlock[1]; + char *dlerror_buf; + void *stdio_locks; + + /* Part 3 -- the positions of these fields relative to + * the end of the structure is external and internal ABI. */ +#ifdef TLS_ABOVE_TP + uintptr_t canary; + uintptr_t *dtv; +#endif +}; + +enum { + DT_EXITED = 0, + DT_EXITING, + DT_JOINABLE, + DT_DETACHED, +}; + +#define __SU (sizeof(size_t)/sizeof(int)) + +#define _a_stacksize __u.__s[0] +#define _a_guardsize __u.__s[1] +#define _a_stackaddr __u.__s[2] +#define _a_detach __u.__i[3*__SU+0] +#define _a_sched __u.__i[3*__SU+1] +#define _a_policy __u.__i[3*__SU+2] +#define _a_prio __u.__i[3*__SU+3] +#define _m_type __u.__i[0] +#define _m_lock __u.__vi[1] +#define _m_waiters __u.__vi[2] +#define _m_prev __u.__p[3] +#define _m_next __u.__p[4] +#define _m_count __u.__i[5] +#define _c_shared __u.__p[0] +#define _c_seq __u.__vi[2] +#define _c_waiters __u.__vi[3] +#define _c_clock __u.__i[4] +#define _c_lock __u.__vi[8] +#define _c_head __u.__p[1] +#define _c_tail __u.__p[5] +#define _rw_lock __u.__vi[0] +#define _rw_waiters __u.__vi[1] +#define _rw_shared __u.__i[2] +#define _b_lock __u.__vi[0] +#define _b_waiters __u.__vi[1] +#define _b_limit __u.__i[2] +#define _b_count __u.__vi[3] +#define _b_waiters2 __u.__vi[4] +#define _b_inst __u.__p[3] + +#ifndef TP_OFFSET +#define TP_OFFSET 0 +#endif + +#ifndef DTP_OFFSET +#define DTP_OFFSET 0 +#endif + +#ifdef TLS_ABOVE_TP +#define TP_ADJ(p) ((char *)(p) + sizeof(struct pthread) + TP_OFFSET) +#define __pthread_self() ((pthread_t)(__get_tp() - sizeof(struct __pthread) - TP_OFFSET)) +#else +#define TP_ADJ(p) (p) +#define __pthread_self() ((pthread_t)__get_tp()) +#endif + +#ifndef tls_mod_off_t +#define tls_mod_off_t size_t +#endif + +#define SIGTIMER 32 +#define SIGCANCEL 33 +#define SIGSYNCCALL 34 + +#define SIGALL_SET ((sigset_t *)(const unsigned long long [2]){ -1,-1 }) +#define SIGPT_SET \ + ((sigset_t *)(const unsigned long [_NSIG/8/sizeof(long)]){ \ + [sizeof(long)==4] = 3UL<<(32*(sizeof(long)>4)) }) +#define SIGTIMER_SET \ + ((sigset_t *)(const unsigned long [_NSIG/8/sizeof(long)]){ \ + 0x80000000 }) + +void *__tls_get_addr(tls_mod_off_t *); +hidden int __init_tp(void *); +hidden void *__copy_tls(unsigned char *); +hidden void __reset_tls(); + +hidden void __membarrier_init(void); +hidden void __dl_thread_cleanup(void); +hidden void __testcancel(); +hidden void __do_cleanup_push(struct __ptcb *); +hidden void __do_cleanup_pop(struct __ptcb *); +hidden void __pthread_tsd_run_dtors(); + +hidden void __pthread_key_delete_synccall(void (*)(void *), void *); +hidden int __pthread_key_delete_impl(pthread_key_t); + +extern hidden volatile size_t __pthread_tsd_size; +extern hidden void *__pthread_tsd_main[]; +extern hidden volatile int __eintr_valid_flag; + +hidden int __clone(int (*)(void *), void *, int, void *, ...); +hidden int __set_thread_area(void *); +#ifdef __wasilibc_unmodified_upstream /* WASI has no sigaction */ +hidden int __libc_sigaction(int, const struct sigaction *, struct sigaction *); +#endif +hidden void __unmapself(void *, size_t); + +#ifndef __wasilibc_unmodified_upstream +hidden int __wasilibc_futex_wait(volatile void *, int, int, int64_t); +#endif +hidden int __timedwait(volatile int *, int, clockid_t, const struct timespec *, int); +hidden int __timedwait_cp(volatile int *, int, clockid_t, const struct timespec *, int); +hidden void __wait(volatile int *, volatile int *, int, int); +static inline void __wake(volatile void *addr, int cnt, int priv) +{ + if (priv) priv = FUTEX_PRIVATE; + if (cnt<0) cnt = INT_MAX; +#ifdef __wasilibc_unmodified_upstream + __syscall(SYS_futex, addr, FUTEX_WAKE|priv, cnt) != -ENOSYS || + __syscall(SYS_futex, addr, FUTEX_WAKE, cnt); +#else + __builtin_wasm_memory_atomic_notify((int*)addr, cnt); +#endif +} +static inline void __futexwait(volatile void *addr, int val, int priv) +{ +#ifdef __wasilibc_unmodified_upstream + if (priv) priv = FUTEX_PRIVATE; + __syscall(SYS_futex, addr, FUTEX_WAIT|priv, val, 0) != -ENOSYS || + __syscall(SYS_futex, addr, FUTEX_WAIT, val, 0); +#else + __wait(addr, NULL, val, priv); +#endif +} + +hidden void __acquire_ptc(void); +hidden void __release_ptc(void); +hidden void __inhibit_ptc(void); + +hidden void __tl_lock(void); +hidden void __tl_unlock(void); +hidden void __tl_sync(pthread_t); + +extern hidden volatile int __thread_list_lock; + +extern hidden volatile int __abort_lock[1]; + +extern hidden unsigned __default_stacksize; +extern hidden unsigned __default_guardsize; + +#define DEFAULT_STACK_SIZE 131072 +#define DEFAULT_GUARD_SIZE 8192 + +#define DEFAULT_STACK_MAX (8<<20) +#define DEFAULT_GUARD_MAX (1<<20) + +#define __ATTRP_C11_THREAD ((void*)(uintptr_t)-1) + +#endif |