pthread_int.h revision 1.1.2.2
1 /* $Id: pthread_int.h,v 1.1.2.2 2001/07/13 02:09:31 nathanw Exp $ */ 2 /* Copyright */ 3 4 #ifndef _LIB_PTHREAD_INT_H 5 #define _LIB_PTHREAD_INT_H 6 7 #include <sa.h> 8 #include <signal.h> 9 10 #define PTHREAD__DEBUG 11 12 #include "pthread_types.h" 13 14 15 struct pthread_st { 16 unsigned int pt_magic; 17 18 int pt_type; /* normal, upcall, or idle */ 19 int pt_state; /* running, blocked, etc. */ 20 int pt_flags; 21 int pt_spinlocks; /* Number of spinlocks held. */ 22 23 /* Entry on the run queue */ 24 PTQ_ENTRY(pthread_st) pt_runq; 25 /* Entry on the list of all threads */ 26 PTQ_ENTRY(pthread_st) pt_allq; 27 /* Entry on the sleep queue (xxx should be same as run queue?) */ 28 PTQ_ENTRY(pthread_st) pt_sleep; 29 30 stack_t pt_stack; /* Our stack */ 31 ucontext_t *pt_uc; /* Saved context when we're stopped */ 32 33 sigset_t pt_sigmask; /* Signals we won't take. */ 34 sigset_t pt_siglist; /* Signals pending for us. */ 35 pt_spin_t pt_siglock; /* Lock on above */ 36 37 void * pt_exitval; /* Read by pthread_join() */ 38 39 /* Other threads trying to pthread_join() us. */ 40 struct pt_queue_t pt_joiners; 41 /* Lock for above, and for changing pt_state to ZOMBIE or DEAD, 42 * and for setting the DETACHED flag 43 */ 44 pt_spin_t pt_join_lock; 45 46 /* Thread we were going to switch to before we were preempted 47 * ourselves. Will be used by the upcall that's continuing us. 48 */ 49 pthread_t pt_switchto; 50 ucontext_t* pt_switchtouc; 51 52 /* Threads that are preempted with spinlocks held will be 53 * continued until they unlock their spinlock. When they do 54 * so, they should jump ship to the thread pointed to by 55 * pt_next. 56 */ 57 pthread_t pt_next; 58 59 /* The upcall that is continuing this thread */ 60 pthread_t pt_parent; 61 62 /* A queue lock that this thread held while trying to 63 * context switch to another process. 64 */ 65 pt_spin_t* pt_heldlock; 66 67 #ifdef PTHREAD__DEBUG 68 int blocks; 69 int preempts; 70 int rescheds; 71 #endif 72 }; 73 74 75 76 /* Thread types */ 77 #define PT_THREAD_NORMAL 1 78 #define PT_THREAD_UPCALL 2 79 #define PT_THREAD_IDLE 3 80 81 /* Thread states */ 82 #define PT_STATE_RUNNABLE 1 83 #define PT_STATE_BLOCKED 2 84 #define PT_STATE_ZOMBIE 3 85 #define PT_STATE_DEAD 4 86 #define PT_STATE_RECYCLABLE 5 87 88 /* Flag values */ 89 90 #define PT_FLAG_DETACHED 0x0001 91 #define PT_FLAG_IDLED 0x0002 92 93 #define PT_MAGIC 0xBABCAAAA 94 #define PT_DEAD 0xDEADBEEF 95 96 #define PT_ATTR_MAGIC 0x5555FACE 97 #define PT_ATTR_DEAD 0xFACEDEAD 98 99 #define PT_STACKSIZE (1<<20) 100 #define PT_STACKMASK (PT_STACKSIZE-1) 101 102 #define PT_UPCALLSTACKS 16 103 104 #define IDLESPINS 1000 105 106 /* Utility functions */ 107 108 void* pthread__malloc(size_t size); 109 void pthread__free(void *ptr); 110 111 /* Set up/clean up a thread's basic state. */ 112 void pthread__initthread(pthread_t t); 113 114 /* Go do something else. Don't go back on the run queue */ 115 void pthread__block(pthread_t self, pt_spin_t* queuelock); 116 /* Put a thread back on the run queue */ 117 void pthread__sched(pthread_t self, pthread_t thread); 118 void pthread__sched_idle(pthread_t self, pthread_t thread); 119 void pthread__sched_idle2(pthread_t self); 120 121 void pthread__sched_bulk(pthread_t self, pthread_t qhead); 122 123 void pthread__idle(void); 124 125 /* Get the next thread */ 126 pthread_t pthread__next(pthread_t self); 127 128 int pthread__stackalloc(pthread_t *t); 129 void pthread__initmain(pthread_t *t); 130 131 void pthread__sa_start(void); 132 void pthread__sa_recycle(pthread_t old, pthread_t new); 133 134 #include "pthread_md.h" 135 136 /* Stack location of pointer to a particular thread */ 137 #define pthread__id(sp) \ 138 ((pthread_t) (((vaddr_t)(sp)) & ~PT_STACKMASK)) 139 140 #define pthread__self() (pthread__id(pthread__sp())) 141 142 void pthread__upcall_switch(pthread_t self, pthread_t next); 143 void pthread__switch(pthread_t self, pthread_t next, int locks); 144 void pthread__locked_switch(pthread_t self, pthread_t next, 145 pt_spin_t *lock); 146 147 void pthread_lockinit(pt_spin_t *lock); 148 void pthread_spinlock(pthread_t thread, pt_spin_t *lock); 149 int pthread_spintrylock(pthread_t thread, pt_spin_t *lock); 150 void pthread_spinunlock(pthread_t thread, pt_spin_t *lock); 151 152 void pthread__signal(pthread_t t, int sig, int code); 153 154 155 156 #define PTHREADD_CREATE 0 157 #define PTHREADD_IDLE 1 158 #define PTHREADD_UPCALLS 2 159 #define PTHREADD_UP_BLOCK 3 160 #define PTHREADD_UP_NEW 4 161 #define PTHREADD_UP_PREEMPT 5 162 #define PTHREADD_UP_UNBLOCK 6 163 #define PTHREADD_UP_SIGNAL 7 164 #define PTHREADD_SPINLOCKS 8 165 #define PTHREADD_SPINUNLOCKS 9 166 #define PTHREADD_SPINPREEMPT 10 167 #define PTHREADD_RESOLVELOCKS 11 168 #define PTHREADD_SWITCHTO 12 169 #define PTHREADD_NCOUNTERS 13 170 171 #ifdef PTHREAD__DEBUG 172 173 extern int pthread__debug_counters[PTHREADD_NCOUNTERS]; 174 175 #define PTHREADD_ADD(x) (pthread__debug_counters[(x)]++) 176 177 #else /* PTHREAD_DEBUG */ 178 179 #define PTHREADD_ADD(x) 180 181 #endif /* PTHREAD_DEBUG */ 182 183 184 185 186 #endif /* _LIB_PTHREAD_INT_H */ 187 188
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