| #ifndef GC_PTHREAD_SUPPORT_H |
| #define GC_PTHREAD_SUPPORT_H |
| |
| # include "private/gc_priv.h" |
| |
| # if defined(GC_PTHREADS) && !defined(GC_WIN32_THREADS) |
| |
| #if defined(GC_DARWIN_THREADS) |
| # include "private/darwin_stop_world.h" |
| #else |
| # include "private/pthread_stop_world.h" |
| #endif |
| |
| #ifdef THREAD_LOCAL_ALLOC |
| # include "thread_local_alloc.h" |
| #endif /* THREAD_LOCAL_ALLOC */ |
| |
| /* We use the allocation lock to protect thread-related data structures. */ |
| |
| /* The set of all known threads. We intercept thread creation and */ |
| /* joins. */ |
| /* Protected by allocation/GC lock. */ |
| /* Some of this should be declared volatile, but that's inconsistent */ |
| /* with some library routine declarations. */ |
| typedef struct GC_Thread_Rep { |
| struct GC_Thread_Rep * next; /* More recently allocated threads */ |
| /* with a given pthread id come */ |
| /* first. (All but the first are */ |
| /* guaranteed to be dead, but we may */ |
| /* not yet have registered the join.) */ |
| pthread_t id; |
| /* Extra bookkeeping information the stopping code uses */ |
| struct thread_stop_info stop_info; |
| |
| short flags; |
| # define FINISHED 1 /* Thread has exited. */ |
| # define DETACHED 2 /* Thread is treated as detached. */ |
| /* Thread may really be detached, or */ |
| /* it may have have been explicitly */ |
| /* registered, in which case we can */ |
| /* deallocate its GC_Thread_Rep once */ |
| /* it unregisters itself, since it */ |
| /* may not return a GC pointer. */ |
| # define MAIN_THREAD 4 /* True for the original thread only. */ |
| short thread_blocked; /* Protected by GC lock. */ |
| /* Treated as a boolean value. If set, */ |
| /* thread will acquire GC lock before */ |
| /* doing any pointer manipulations, and */ |
| /* has set its sp value. Thus it does */ |
| /* not need to be sent a signal to stop */ |
| /* it. */ |
| ptr_t stack_end; /* Cold end of the stack. */ |
| # ifdef IA64 |
| ptr_t backing_store_end; |
| ptr_t backing_store_ptr; |
| # endif |
| void * status; /* The value returned from the thread. */ |
| /* Used only to avoid premature */ |
| /* reclamation of any data it might */ |
| /* reference. */ |
| /* This is unfortunately also the */ |
| /* reason we need to intercept join */ |
| /* and detach. */ |
| # ifdef THREAD_LOCAL_ALLOC |
| struct thread_local_freelists tlfs; |
| # endif |
| } * GC_thread; |
| |
| # define THREAD_TABLE_SZ 256 /* Must be power of 2 */ |
| extern volatile GC_thread GC_threads[THREAD_TABLE_SZ]; |
| |
| extern GC_bool GC_thr_initialized; |
| |
| GC_thread GC_lookup_thread(pthread_t id); |
| |
| void GC_stop_init(); |
| |
| extern GC_bool GC_in_thread_creation; |
| /* We may currently be in thread creation or destruction. */ |
| /* Only set to TRUE while allocation lock is held. */ |
| /* When set, it is OK to run GC from unknown thread. */ |
| |
| #endif /* GC_PTHREADS && !GC_SOLARIS_THREADS.... etc */ |
| #endif /* GC_PTHREAD_SUPPORT_H */ |