fusl/src/internal/pthread_impl.h

#ifndef _PTHREAD_IMPL_H
#define _PTHREAD_IMPL_H

#include <pthread.h>
#include <signal.h>
#include <errno.h>
#include <limits.h>
#include "libc.h"
#include "syscall.h"
#include "atomic.h"
#include "futex.h"

#define pthread __pthread

struct pthread {
  struct pthread* self;
  void **dtv, *unused1, *unused2;
  uintptr_t sysinfo;
  uintptr_t canary, canary2;
  pid_t tid, pid;
  int tsd_used, errno_val;
  volatile int cancel, canceldisable, cancelasync;
  int detached;
  unsigned char* map_base;
  size_t map_size;
  void* stack;
  size_t stack_size;
  void* start_arg;
  void* (*start)(void*);
  void* result;
  struct __ptcb* cancelbuf;
  void** tsd;
  pthread_attr_t attr;
  volatile int dead;
  struct {
    volatile void* volatile head;
    long off;
    volatile void* volatile pending;
  } robust_list;
  int unblock_cancel;
  volatile int timer_id;
  locale_t locale;
  volatile int killlock[2];
  volatile int exitlock[2];
  volatile int startlock[2];
  unsigned long sigmask[_NSIG / 8 / sizeof(long)];
  char* dlerror_buf;
  int dlerror_flag;
  void* stdio_locks;
  uintptr_t canary_at_end;
  void** dtv_copy;
};

struct __timer {
  int timerid;
  pthread_t thread;
};

#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]

#include "pthread_arch.h"

#ifndef CANARY
#define CANARY canary
#endif

#ifndef DTP_OFFSET
#define DTP_OFFSET 0
#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})

pthread_t __pthread_self_init(void);

int __clone(int (*)(void*), void*, int, void*, ...);
int __set_thread_area(void*);
int __libc_sigaction(int, const struct sigaction*, struct sigaction*);
int __libc_sigprocmask(int, const sigset_t*, sigset_t*);
void __lock(volatile int*);
void __unmapself(void*, size_t);

void __vm_wait(void);
void __vm_lock(void);
void __vm_unlock(void);

int __timedwait(volatile int*, int, clockid_t, const struct timespec*, int);
int __timedwait_cp(volatile int*, int, clockid_t, const struct timespec*, int);
void __wait(volatile int*, volatile int*, int, int);
static inline void __wake(volatile void* addr, int cnt, int priv) {
  if (priv)
    priv = 128;
  if (cnt < 0)
    cnt = INT_MAX;
  __syscall(SYS_futex, addr, FUTEX_WAKE | priv, cnt) != -ENOSYS ||
      __syscall(SYS_futex, addr, FUTEX_WAKE, cnt);
}

void __acquire_ptc(void);
void __release_ptc(void);
void __inhibit_ptc(void);

void __block_all_sigs(void*);
void __block_app_sigs(void*);
void __restore_sigs(void*);

#define DEFAULT_STACK_SIZE 81920
#define DEFAULT_GUARD_SIZE PAGE_SIZE

#define __ATTRP_C11_THREAD ((void*)(uintptr_t)-1)

#endif