-/*
+/*
* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
* Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved.
* DCL_LOCK_STATE declares any local variables needed by LOCK and UNLOCK.
*
* Note that I_HOLD_LOCK and I_DONT_HOLD_LOCK are used only positively
- * in assertions, and may return TRUE in the "dont know" case.
- */
+ * in assertions, and may return TRUE in the "don't know" case.
+ */
# ifdef THREADS
-# include <atomic_ops.h>
+
+# if defined(GC_PTHREADS) && !defined(GC_WIN32_THREADS)
+# include "atomic_ops.h"
+# endif
GC_API void GC_CALL GC_noop1(word);
# ifdef PCR
# include <base/PCR_Base.h>
# include <th/PCR_Th.h>
- extern PCR_Th_ML GC_allocate_ml;
+ GC_EXTERN PCR_Th_ML GC_allocate_ml;
# define DCL_LOCK_STATE \
- PCR_ERes GC_fastLockRes; PCR_sigset_t GC_old_sig_mask
+ PCR_ERes GC_fastLockRes; PCR_sigset_t GC_old_sig_mask
# define UNCOND_LOCK() PCR_Th_ML_Acquire(&GC_allocate_ml)
# define UNCOND_UNLOCK() PCR_Th_ML_Release(&GC_allocate_ml)
# endif
# if defined(GC_WIN32_THREADS) && !defined(USE_PTHREAD_LOCKS)
# include <windows.h>
# define NO_THREAD (DWORD)(-1)
- extern DWORD GC_lock_holder;
- GC_API CRITICAL_SECTION GC_allocate_ml;
+ GC_EXTERN DWORD GC_lock_holder;
+ GC_EXTERN CRITICAL_SECTION GC_allocate_ml;
# ifdef GC_ASSERTIONS
# define UNCOND_LOCK() \
- { EnterCriticalSection(&GC_allocate_ml); \
- SET_LOCK_HOLDER(); }
+ { EnterCriticalSection(&GC_allocate_ml); \
+ SET_LOCK_HOLDER(); }
# define UNCOND_UNLOCK() \
- { GC_ASSERT(I_HOLD_LOCK()); UNSET_LOCK_HOLDER(); \
- LeaveCriticalSection(&GC_allocate_ml); }
+ { GC_ASSERT(I_HOLD_LOCK()); UNSET_LOCK_HOLDER(); \
+ LeaveCriticalSection(&GC_allocate_ml); }
# else
# define UNCOND_LOCK() EnterCriticalSection(&GC_allocate_ml);
# define UNCOND_UNLOCK() LeaveCriticalSection(&GC_allocate_ml);
# define SET_LOCK_HOLDER() GC_lock_holder = GetCurrentThreadId()
# define UNSET_LOCK_HOLDER() GC_lock_holder = NO_THREAD
# define I_HOLD_LOCK() (!GC_need_to_lock \
- || GC_lock_holder == GetCurrentThreadId())
+ || GC_lock_holder == GetCurrentThreadId())
# define I_DONT_HOLD_LOCK() (!GC_need_to_lock \
- || GC_lock_holder != GetCurrentThreadId())
+ || GC_lock_holder != GetCurrentThreadId())
# elif defined(GC_PTHREADS)
# include <pthread.h>
-
- /* Posix allows pthread_t to be a struct, though it rarely is. */
- /* Unfortunately, we need to use a pthread_t to index a data */
- /* structure. It also helps if comparisons don't involve a */
- /* function call. Hence we introduce platform-dependent macros */
- /* to compare pthread_t ids and to map them to integers. */
- /* the mapping to integers does not need to result in different */
- /* integers for each thread, though that should be true as much */
- /* as possible. */
+
+ /* Posix allows pthread_t to be a struct, though it rarely is. */
+ /* Unfortunately, we need to use a pthread_t to index a data */
+ /* structure. It also helps if comparisons don't involve a */
+ /* function call. Hence we introduce platform-dependent macros */
+ /* to compare pthread_t ids and to map them to integers. */
+ /* the mapping to integers does not need to result in different */
+ /* integers for each thread, though that should be true as much */
+ /* as possible. */
/* Refine to exclude platforms on which pthread_t is struct */
# if !defined(GC_WIN32_PTHREADS)
# define NUMERIC_THREAD_ID(id) ((unsigned long)(id))
# define NUMERIC_THREAD_ID_UNIQUE
# else
# if defined(GC_WIN32_PTHREADS)
-# define NUMERIC_THREAD_ID(id) ((unsigned long)(id.p))
- /* Using documented internal details of win32_pthread library. */
- /* Faster than pthread_equal(). Should not change with */
- /* future versions of win32_pthread library. */
-# define THREAD_EQUAL(id1, id2) ((id1.p == id2.p) && (id1.x == id2.x))
+# define NUMERIC_THREAD_ID(id) ((unsigned long)(id.p))
+ /* Using documented internal details of win32_pthread library. */
+ /* Faster than pthread_equal(). Should not change with */
+ /* future versions of win32_pthread library. */
+# define THREAD_EQUAL(id1, id2) ((id1.p == id2.p) && (id1.x == id2.x))
# undef NUMERIC_THREAD_ID_UNIQUE
# else
- /* Generic definitions that always work, but will result in */
- /* poor performance and weak assertion checking. */
-# define NUMERIC_THREAD_ID(id) 1l
-# define THREAD_EQUAL(id1, id2) pthread_equal(id1, id2)
+ /* Generic definitions that always work, but will result in */
+ /* poor performance and weak assertion checking. */
+# define NUMERIC_THREAD_ID(id) 1l
+# define THREAD_EQUAL(id1, id2) pthread_equal(id1, id2)
# undef NUMERIC_THREAD_ID_UNIQUE
# endif
# endif
# define NO_THREAD ((unsigned long)(-1l))
- /* != NUMERIC_THREAD_ID(pthread_self()) for any thread */
+ /* != NUMERIC_THREAD_ID(pthread_self()) for any thread */
# if !defined(THREAD_LOCAL_ALLOC) && !defined(USE_PTHREAD_LOCKS)
- /* In the THREAD_LOCAL_ALLOC case, the allocation lock tends to */
- /* be held for long periods, if it is held at all. Thus spinning */
- /* and sleeping for fixed periods are likely to result in */
+ /* In the THREAD_LOCAL_ALLOC case, the allocation lock tends to */
+ /* be held for long periods, if it is held at all. Thus spinning */
+ /* and sleeping for fixed periods are likely to result in */
/* significant wasted time. We thus rely mostly on queued locks. */
# define USE_SPIN_LOCK
- extern volatile AO_TS_t GC_allocate_lock;
- extern void GC_lock(void);
- /* Allocation lock holder. Only set if acquired by client through */
- /* GC_call_with_alloc_lock. */
+ GC_EXTERN volatile AO_TS_t GC_allocate_lock;
+ GC_INNER void GC_lock(void);
+ /* Allocation lock holder. Only set if acquired by client through */
+ /* GC_call_with_alloc_lock. */
# ifdef GC_ASSERTIONS
# define UNCOND_LOCK() \
- { if (AO_test_and_set_acquire(&GC_allocate_lock) == AO_TS_SET) \
- GC_lock(); \
- SET_LOCK_HOLDER(); }
+ { if (AO_test_and_set_acquire(&GC_allocate_lock) == AO_TS_SET) \
+ GC_lock(); \
+ SET_LOCK_HOLDER(); }
# define UNCOND_UNLOCK() \
- { GC_ASSERT(I_HOLD_LOCK()); UNSET_LOCK_HOLDER(); \
- AO_CLEAR(&GC_allocate_lock); }
+ { GC_ASSERT(I_HOLD_LOCK()); UNSET_LOCK_HOLDER(); \
+ AO_CLEAR(&GC_allocate_lock); }
# else
# define UNCOND_LOCK() \
- { if (AO_test_and_set_acquire(&GC_allocate_lock) == AO_TS_SET) \
- GC_lock(); }
+ { if (AO_test_and_set_acquire(&GC_allocate_lock) == AO_TS_SET) \
+ GC_lock(); }
# define UNCOND_UNLOCK() \
- AO_CLEAR(&GC_allocate_lock)
+ AO_CLEAR(&GC_allocate_lock)
# endif /* !GC_ASSERTIONS */
# else /* THREAD_LOCAL_ALLOC || USE_PTHREAD_LOCKS */
# ifndef USE_PTHREAD_LOCKS
# endif /* THREAD_LOCAL_ALLOC || USE_PTHREAD_LOCK */
# ifdef USE_PTHREAD_LOCKS
# include <pthread.h>
- extern pthread_mutex_t GC_allocate_ml;
+ GC_EXTERN pthread_mutex_t GC_allocate_ml;
# ifdef GC_ASSERTIONS
# define UNCOND_LOCK() \
- { GC_lock(); \
- SET_LOCK_HOLDER(); }
+ { GC_lock(); \
+ SET_LOCK_HOLDER(); }
# define UNCOND_UNLOCK() \
- { GC_ASSERT(I_HOLD_LOCK()); UNSET_LOCK_HOLDER(); \
- pthread_mutex_unlock(&GC_allocate_ml); }
+ { GC_ASSERT(I_HOLD_LOCK()); UNSET_LOCK_HOLDER(); \
+ pthread_mutex_unlock(&GC_allocate_ml); }
# else /* !GC_ASSERTIONS */
# if defined(NO_PTHREAD_TRYLOCK)
# define UNCOND_LOCK() GC_lock();
# else /* !defined(NO_PTHREAD_TRYLOCK) */
# define UNCOND_LOCK() \
- { if (0 != pthread_mutex_trylock(&GC_allocate_ml)) GC_lock(); }
+ { if (0 != pthread_mutex_trylock(&GC_allocate_ml)) GC_lock(); }
# endif
# define UNCOND_UNLOCK() pthread_mutex_unlock(&GC_allocate_ml)
# endif /* !GC_ASSERTIONS */
# endif /* USE_PTHREAD_LOCKS */
# define SET_LOCK_HOLDER() \
- GC_lock_holder = NUMERIC_THREAD_ID(pthread_self())
+ GC_lock_holder = NUMERIC_THREAD_ID(pthread_self())
# define UNSET_LOCK_HOLDER() GC_lock_holder = NO_THREAD
# define I_HOLD_LOCK() \
- (!GC_need_to_lock || \
- GC_lock_holder == NUMERIC_THREAD_ID(pthread_self()))
+ (!GC_need_to_lock || \
+ GC_lock_holder == NUMERIC_THREAD_ID(pthread_self()))
# ifndef NUMERIC_THREAD_ID_UNIQUE
# define I_DONT_HOLD_LOCK() 1 /* Conservatively say yes */
# else
# define I_DONT_HOLD_LOCK() \
- (!GC_need_to_lock \
- || GC_lock_holder != NUMERIC_THREAD_ID(pthread_self()))
+ (!GC_need_to_lock \
+ || GC_lock_holder != NUMERIC_THREAD_ID(pthread_self()))
# endif
- extern volatile GC_bool GC_collecting;
+ GC_EXTERN volatile GC_bool GC_collecting;
# define ENTER_GC() GC_collecting = 1;
# define EXIT_GC() GC_collecting = 0;
- extern void GC_lock(void);
- extern unsigned long GC_lock_holder;
+ GC_INNER void GC_lock(void);
+ GC_EXTERN unsigned long GC_lock_holder;
# ifdef GC_ASSERTIONS
- extern unsigned long GC_mark_lock_holder;
+ GC_EXTERN unsigned long GC_mark_lock_holder;
# endif
# endif /* GC_PTHREADS with linux_threads.c implementation */
# define UNSET_LOCK_HOLDER()
# define I_HOLD_LOCK() TRUE
# define I_DONT_HOLD_LOCK() TRUE
- /* Used only in positive assertions or to test whether */
- /* we still need to acquire the lock. TRUE works in */
- /* either case. */
+ /* Used only in positive assertions or to test whether */
+ /* we still need to acquire the lock. TRUE works in */
+ /* either case. */
# endif /* !THREADS */
-#if defined(UNCOND_LOCK) && !defined(LOCK)
- GC_API GC_bool GC_need_to_lock;
- /* At least two thread running; need to lock. */
+#if defined(UNCOND_LOCK) && !defined(LOCK)
+ GC_EXTERN GC_bool GC_need_to_lock;
+ /* At least two thread running; need to lock. */
# define LOCK() if (GC_need_to_lock) { UNCOND_LOCK(); }
# define UNLOCK() if (GC_need_to_lock) { UNCOND_UNLOCK(); }
#endif
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