1 #ifndef GC_PTHREAD_SUPPORT_H 2 #define GC_PTHREAD_SUPPORT_H 3 4 # include "private/gc_priv.h" 5 6 # if defined(GC_PTHREADS) && !defined(GC_SOLARIS_THREADS) \ 7 && !defined(GC_IRIX_THREADS) && !defined(GC_WIN32_THREADS) 8 9 #if defined(GC_DARWIN_THREADS) 10 # include "private/darwin_stop_world.h" 11 #else 12 # include "private/pthread_stop_world.h" 13 #endif 14 15 /* We use the allocation lock to protect thread-related data structures. */ 16 17 /* The set of all known threads. We intercept thread creation and */ 18 /* joins. */ 19 /* Protected by allocation/GC lock. */ 20 /* Some of this should be declared volatile, but that's inconsistent */ 21 /* with some library routine declarations. */ 22 typedef struct GC_Thread_Rep { 23 struct GC_Thread_Rep * next; /* More recently allocated threads */ 24 /* with a given pthread id come */ 25 /* first. (All but the first are */ 26 /* guaranteed to be dead, but we may */ 27 /* not yet have registered the join.) */ 28 pthread_t id; 29 /* Extra bookkeeping information the stopping code uses */ 30 struct thread_stop_info stop_info; 31 32 short flags; 33 # define FINISHED 1 /* Thread has exited. */ 34 # define DETACHED 2 /* Thread is intended to be detached. */ 35 # define MAIN_THREAD 4 /* True for the original thread only. */ 36 short thread_blocked; /* Protected by GC lock. */ 37 /* Treated as a boolean value. If set, */ 38 /* thread will acquire GC lock before */ 39 /* doing any pointer manipulations, and */ 40 /* has set its sp value. Thus it does */ 41 /* not need to be sent a signal to stop */ 42 /* it. */ 43 ptr_t stack_end; /* Cold end of the stack. */ 44 # ifdef IA64 45 ptr_t backing_store_end; 46 ptr_t backing_store_ptr; 47 # endif 48 void * status; /* The value returned from the thread. */ 49 /* Used only to avoid premature */ 50 /* reclamation of any data it might */ 51 /* reference. */ 52 # ifdef THREAD_LOCAL_ALLOC 53 # if CPP_WORDSZ == 64 && defined(ALIGN_DOUBLE) 54 # define GRANULARITY 16 55 # define NFREELISTS 49 56 # else 57 # define GRANULARITY 8 58 # define NFREELISTS 65 59 # endif 60 /* The ith free list corresponds to size i*GRANULARITY */ 61 # define INDEX_FROM_BYTES(n) ((ADD_SLOP(n) + GRANULARITY - 1)/GRANULARITY) 62 # define BYTES_FROM_INDEX(i) ((i) * GRANULARITY - EXTRA_BYTES) 63 # define SMALL_ENOUGH(bytes) (ADD_SLOP(bytes) <= \ 64 (NFREELISTS-1)*GRANULARITY) 65 ptr_t ptrfree_freelists[NFREELISTS]; 66 ptr_t normal_freelists[NFREELISTS]; 67 # ifdef GC_GCJ_SUPPORT 68 ptr_t gcj_freelists[NFREELISTS]; 69 # endif 70 /* Free lists contain either a pointer or a small count */ 71 /* reflecting the number of granules allocated at that */ 72 /* size. */ 73 /* 0 ==> thread-local allocation in use, free list */ 74 /* empty. */ 75 /* > 0, <= DIRECT_GRANULES ==> Using global allocation, */ 76 /* too few objects of this size have been */ 77 /* allocated by this thread. */ 78 /* >= HBLKSIZE => pointer to nonempty free list. */ 79 /* > DIRECT_GRANULES, < HBLKSIZE ==> transition to */ 80 /* local alloc, equivalent to 0. */ 81 # define DIRECT_GRANULES (HBLKSIZE/GRANULARITY) 82 /* Don't use local free lists for up to this much */ 83 /* allocation. */ 84 # endif 85 } * GC_thread; 86 87 # define THREAD_TABLE_SZ 128 /* Must be power of 2 */ 88 extern volatile GC_thread GC_threads[THREAD_TABLE_SZ]; 89 90 extern GC_bool GC_thr_initialized; 91 92 GC_thread GC_lookup_thread(pthread_t id); 93 94 void GC_stop_init(); 95 96 #endif /* GC_PTHREADS && !GC_SOLARIS_THREADS.... etc */ 97 #endif /* GC_PTHREAD_SUPPORT_H */ 98