1 #ifndef _PTHREAD_IMPL_H
2 #define _PTHREAD_IMPL_H
3
4 #include <pthread.h>
5 #include <signal.h>
6 #include <errno.h>
7 #include <limits.h>
8 #include <sys/mman.h>
9 #include "libc.h"
10 #include "syscall.h"
11 #include "atomic.h"
12 #include "futex.h"
13
14 #define pthread __pthread
15
16 struct pthread {
17 /* Part 1 -- these fields may be external or
18 * internal (accessed via asm) ABI. Do not change. */
19 struct pthread *self;
20 uintptr_t *dtv;
21 struct pthread *prev, *next; /* non-ABI */
22 uintptr_t sysinfo;
23 uintptr_t canary, canary2;
24
25 /* Part 2 -- implementation details, non-ABI. */
26 int tid;
27 int errno_val;
28 volatile int detach_state;
29 volatile int cancel;
30 volatile unsigned char canceldisable, cancelasync;
31 unsigned char tsd_used:1;
32 unsigned char dlerror_flag:1;
33 unsigned char *map_base;
34 size_t map_size;
35 void *stack;
36 size_t stack_size;
37 size_t guard_size;
38 void *result;
39 struct __ptcb *cancelbuf;
40 void **tsd;
41 struct {
42 volatile void *volatile head;
43 long off;
44 volatile void *volatile pending;
45 } robust_list;
46 volatile int timer_id;
47 locale_t locale;
48 volatile int killlock[1];
49 char *dlerror_buf;
50 void *stdio_locks;
51
52 /* Part 3 -- the positions of these fields relative to
53 * the end of the structure is external and internal ABI. */
54 uintptr_t canary_at_end;
55 uintptr_t *dtv_copy;
56 };
57
58 enum {
59 DT_EXITING = 0,
60 DT_JOINABLE,
61 DT_DETACHED,
62 };
63
64 struct __timer {
65 int timerid;
66 pthread_t thread;
67 };
68
69 #define __SU (sizeof(size_t)/sizeof(int))
70
71 #define _a_stacksize __u.__s[0]
72 #define _a_guardsize __u.__s[1]
73 #define _a_stackaddr __u.__s[2]
74 #define _a_detach __u.__i[3*__SU+0]
75 #define _a_sched __u.__i[3*__SU+1]
76 #define _a_policy __u.__i[3*__SU+2]
77 #define _a_prio __u.__i[3*__SU+3]
78 #define _m_type __u.__i[0]
79 #define _m_lock __u.__vi[1]
80 #define _m_waiters __u.__vi[2]
81 #define _m_prev __u.__p[3]
82 #define _m_next __u.__p[4]
83 #define _m_count __u.__i[5]
84 #define _c_shared __u.__p[0]
85 #define _c_seq __u.__vi[2]
86 #define _c_waiters __u.__vi[3]
87 #define _c_clock __u.__i[4]
88 #define _c_lock __u.__vi[8]
89 #define _c_head __u.__p[1]
90 #define _c_tail __u.__p[5]
91 #define _rw_lock __u.__vi[0]
92 #define _rw_waiters __u.__vi[1]
93 #define _rw_shared __u.__i[2]
94 #define _b_lock __u.__vi[0]
95 #define _b_waiters __u.__vi[1]
96 #define _b_limit __u.__i[2]
97 #define _b_count __u.__vi[3]
98 #define _b_waiters2 __u.__vi[4]
99 #define _b_inst __u.__p[3]
100
101 #include "pthread_arch.h"
102
103 #ifndef CANARY
104 #define CANARY canary
105 #endif
106
107 #ifndef DTP_OFFSET
108 #define DTP_OFFSET 0
109 #endif
110
111 #ifndef tls_mod_off_t
112 #define tls_mod_off_t size_t
113 #endif
114
115 #define SIGTIMER 32
116 #define SIGCANCEL 33
117 #define SIGSYNCCALL 34
118
119 #define SIGALL_SET ((sigset_t *)(const unsigned long long [2]){ -1,-1 })
120 #define SIGPT_SET \
121 ((sigset_t *)(const unsigned long [_NSIG/8/sizeof(long)]){ \
122 [sizeof(long)==4] = 3UL<<(32*(sizeof(long)>4)) })
123 #define SIGTIMER_SET \
124 ((sigset_t *)(const unsigned long [_NSIG/8/sizeof(long)]){ \
125 0x80000000 })
126
127 void *__tls_get_addr(tls_mod_off_t *);
128 hidden int __init_tp(void *);
129 hidden void *__copy_tls(unsigned char *);
130 hidden void __reset_tls();
131
132 hidden void __membarrier_init(void);
133 hidden void __dl_thread_cleanup(void);
134 hidden void __testcancel();
135 hidden void __do_cleanup_push(struct __ptcb *);
136 hidden void __do_cleanup_pop(struct __ptcb *);
137 hidden void __pthread_tsd_run_dtors();
138
139 hidden void __pthread_key_delete_synccall(void (*)(void *), void *);
140 hidden int __pthread_key_delete_impl(pthread_key_t);
141
142 extern hidden volatile size_t __pthread_tsd_size;
143 extern hidden void *__pthread_tsd_main[];
144 extern hidden volatile int __aio_fut;
145 extern hidden volatile int __eintr_valid_flag;
146
147 hidden int __clone(int (*)(void *), void *, int, void *, ...);
148 hidden int __set_thread_area(void *);
149 hidden int __libc_sigaction(int, const struct sigaction *, struct sigaction *);
150 hidden void __unmapself(void *, size_t);
151
152 hidden int __timedwait(volatile int *, int, clockid_t, const struct timespec *, int);
153 hidden int __timedwait_cp(volatile int *, int, clockid_t, const struct timespec *, int);
154 hidden void __wait(volatile int *, volatile int *, int, int);
__wake(volatile void * addr,int cnt,int priv)155 static inline void __wake(volatile void *addr, int cnt, int priv)
156 {
157 if (priv) priv = FUTEX_PRIVATE;
158 if (cnt<0) cnt = INT_MAX;
159 __syscall(SYS_futex, addr, FUTEX_WAKE|priv, cnt) != -ENOSYS ||
160 __syscall(SYS_futex, addr, FUTEX_WAKE, cnt);
161 }
__futexwait(volatile void * addr,int val,int priv)162 static inline void __futexwait(volatile void *addr, int val, int priv)
163 {
164 if (priv) priv = FUTEX_PRIVATE;
165 __syscall(SYS_futex, addr, FUTEX_WAIT|priv, val, 0) != -ENOSYS ||
166 __syscall(SYS_futex, addr, FUTEX_WAIT, val, 0);
167 }
168
169 hidden void __acquire_ptc(void);
170 hidden void __release_ptc(void);
171 hidden void __inhibit_ptc(void);
172
173 hidden void __tl_lock(void);
174 hidden void __tl_unlock(void);
175 hidden void __tl_sync(pthread_t);
176
177 extern hidden volatile int __thread_list_lock;
178
179 extern hidden unsigned __default_stacksize;
180 extern hidden unsigned __default_guardsize;
181
182 #define DEFAULT_STACK_SIZE 131072
183 #define DEFAULT_GUARD_SIZE 8192
184
185 #define DEFAULT_STACK_MAX (8<<20)
186 #define DEFAULT_GUARD_MAX (1<<20)
187
188 #define __ATTRP_C11_THREAD ((void*)(uintptr_t)-1)
189
190 #endif
191