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| author | Edward Thomson <ethomson@edwardthomson.com> | 2020-12-05 15:57:48 +0000 |
|---|---|---|
| committer | Edward Thomson <ethomson@edwardthomson.com> | 2020-12-06 01:08:22 +0000 |
| commit | 404dd02443aebed284033e02ace8b791151aa7a9 (patch) | |
| tree | 7102a446d3c1a8c2f9812f68d87a51416bd8f9cc /src/thread-utils.h | |
| parent | ab7729747c4b55a93b8973e94429c747fe274529 (diff) | |
| download | libgit2-404dd02443aebed284033e02ace8b791151aa7a9.tar.gz | |
threads: rename thread files to thread.[ch]
Diffstat (limited to 'src/thread-utils.h')
| -rw-r--r-- | src/thread-utils.h | 370 |
1 files changed, 0 insertions, 370 deletions
diff --git a/src/thread-utils.h b/src/thread-utils.h deleted file mode 100644 index 9b511b650..000000000 --- a/src/thread-utils.h +++ /dev/null @@ -1,370 +0,0 @@ -/* - * Copyright (C) the libgit2 contributors. All rights reserved. - * - * This file is part of libgit2, distributed under the GNU GPL v2 with - * a Linking Exception. For full terms see the included COPYING file. - */ -#ifndef INCLUDE_thread_utils_h__ -#define INCLUDE_thread_utils_h__ - -#if defined(GIT_THREADS) - -#if defined(__clang__) - -# if (__clang_major__ < 3 || (__clang_major__ == 3 && __clang_minor__ < 1)) -# error Atomic primitives do not exist on this version of clang; configure libgit2 with -DTHREADSAFE=OFF -# else -# define GIT_BUILTIN_ATOMIC -# endif - -#elif defined(__GNUC__) - -# if (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)) -# error Atomic primitives do not exist on this version of gcc; configure libgit2 with -DTHREADSAFE=OFF -# elif (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)) -# define GIT_BUILTIN_ATOMIC -# else -# define GIT_BUILTIN_SYNC -# endif - -#endif - -#endif /* GIT_THREADS */ - -/* Common operations even if threading has been disabled */ -typedef struct { -#if defined(GIT_WIN32) - volatile long val; -#else - volatile int val; -#endif -} git_atomic32; - -#ifdef GIT_ARCH_64 - -typedef struct { -#if defined(GIT_WIN32) - volatile __int64 val; -#else - volatile int64_t val; -#endif -} git_atomic64; - -typedef git_atomic64 git_atomic_ssize; - -#define git_atomic_ssize_set git_atomic64_set -#define git_atomic_ssize_add git_atomic64_add -#define git_atomic_ssize_get git_atomic64_get - -#else - -typedef git_atomic32 git_atomic_ssize; - -#define git_atomic_ssize_set git_atomic32_set -#define git_atomic_ssize_add git_atomic32_add -#define git_atomic_ssize_get git_atomic32_get - -#endif - -#ifdef GIT_THREADS - -#ifdef GIT_WIN32 -# include "win32/thread.h" -#else -# include "unix/pthread.h" -#endif - -GIT_INLINE(void) git_atomic32_set(git_atomic32 *a, int val) -{ -#if defined(GIT_WIN32) - InterlockedExchange(&a->val, (LONG)val); -#elif defined(GIT_BUILTIN_ATOMIC) - __atomic_store_n(&a->val, val, __ATOMIC_SEQ_CST); -#elif defined(GIT_BUILTIN_SYNC) - __sync_lock_test_and_set(&a->val, val); -#else -# error "Unsupported architecture for atomic operations" -#endif -} - -GIT_INLINE(int) git_atomic32_inc(git_atomic32 *a) -{ -#if defined(GIT_WIN32) - return InterlockedIncrement(&a->val); -#elif defined(GIT_BUILTIN_ATOMIC) - return __atomic_add_fetch(&a->val, 1, __ATOMIC_SEQ_CST); -#elif defined(GIT_BUILTIN_SYNC) - return __sync_add_and_fetch(&a->val, 1); -#else -# error "Unsupported architecture for atomic operations" -#endif -} - -GIT_INLINE(int) git_atomic32_add(git_atomic32 *a, int32_t addend) -{ -#if defined(GIT_WIN32) - return InterlockedExchangeAdd(&a->val, addend); -#elif defined(GIT_BUILTIN_ATOMIC) - return __atomic_add_fetch(&a->val, addend, __ATOMIC_SEQ_CST); -#elif defined(GIT_BUILTIN_SYNC) - return __sync_add_and_fetch(&a->val, addend); -#else -# error "Unsupported architecture for atomic operations" -#endif -} - -GIT_INLINE(int) git_atomic32_dec(git_atomic32 *a) -{ -#if defined(GIT_WIN32) - return InterlockedDecrement(&a->val); -#elif defined(GIT_BUILTIN_ATOMIC) - return __atomic_sub_fetch(&a->val, 1, __ATOMIC_SEQ_CST); -#elif defined(GIT_BUILTIN_SYNC) - return __sync_sub_and_fetch(&a->val, 1); -#else -# error "Unsupported architecture for atomic operations" -#endif -} - -GIT_INLINE(int) git_atomic32_get(git_atomic32 *a) -{ -#if defined(GIT_WIN32) - return (int)InterlockedCompareExchange(&a->val, 0, 0); -#elif defined(GIT_BUILTIN_ATOMIC) - return __atomic_load_n(&a->val, __ATOMIC_SEQ_CST); -#elif defined(GIT_BUILTIN_SYNC) - return __sync_val_compare_and_swap(&a->val, 0, 0); -#else -# error "Unsupported architecture for atomic operations" -#endif -} - -GIT_INLINE(void *) git_atomic__compare_and_swap( - void * volatile *ptr, void *oldval, void *newval) -{ -#if defined(GIT_WIN32) - volatile void *foundval; - foundval = InterlockedCompareExchangePointer((volatile PVOID *)ptr, newval, oldval); - return (foundval == oldval) ? oldval : newval; -#elif defined(GIT_BUILTIN_ATOMIC) - bool success = __atomic_compare_exchange(ptr, &oldval, &newval, false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); - return success ? oldval : newval; -#elif defined(GIT_BUILTIN_SYNC) - volatile void *foundval; - foundval = __sync_val_compare_and_swap(ptr, oldval, newval); - return (foundval == oldval) ? oldval : newval; -#else -# error "Unsupported architecture for atomic operations" -#endif -} - -GIT_INLINE(volatile void *) git_atomic__swap( - void * volatile *ptr, void *newval) -{ -#if defined(GIT_WIN32) - return InterlockedExchangePointer(ptr, newval); -#elif defined(GIT_BUILTIN_ATOMIC) - void * volatile foundval; - __atomic_exchange(ptr, &newval, &foundval, __ATOMIC_SEQ_CST); - return foundval; -#elif defined(GIT_BUILTIN_SYNC) - return __sync_lock_test_and_set(ptr, newval); -#else -# error "Unsupported architecture for atomic operations" -#endif -} - -GIT_INLINE(volatile void *) git_atomic__load(void * volatile *ptr) -{ -#if defined(GIT_WIN32) - void *newval = NULL, *oldval = NULL; - volatile void *foundval = NULL; - foundval = InterlockedCompareExchangePointer((volatile PVOID *)ptr, newval, oldval); - return foundval; -#elif defined(GIT_BUILTIN_ATOMIC) - return (volatile void *)__atomic_load_n(ptr, __ATOMIC_SEQ_CST); -#elif defined(GIT_BUILTIN_SYNC) - return (volatile void *)__sync_val_compare_and_swap(ptr, 0, 0); -#else -# error "Unsupported architecture for atomic operations" -#endif -} - -#ifdef GIT_ARCH_64 - -GIT_INLINE(int64_t) git_atomic64_add(git_atomic64 *a, int64_t addend) -{ -#if defined(GIT_WIN32) - return InterlockedExchangeAdd64(&a->val, addend); -#elif defined(GIT_BUILTIN_ATOMIC) - return __atomic_add_fetch(&a->val, addend, __ATOMIC_SEQ_CST); -#elif defined(GIT_BUILTIN_SYNC) - return __sync_add_and_fetch(&a->val, addend); -#else -# error "Unsupported architecture for atomic operations" -#endif -} - -GIT_INLINE(void) git_atomic64_set(git_atomic64 *a, int64_t val) -{ -#if defined(GIT_WIN32) - InterlockedExchange64(&a->val, val); -#elif defined(GIT_BUILTIN_ATOMIC) - __atomic_store_n(&a->val, val, __ATOMIC_SEQ_CST); -#elif defined(GIT_BUILTIN_SYNC) - __sync_lock_test_and_set(&a->val, val); -#else -# error "Unsupported architecture for atomic operations" -#endif -} - -GIT_INLINE(int64_t) git_atomic64_get(git_atomic64 *a) -{ -#if defined(GIT_WIN32) - return (int64_t)InterlockedCompareExchange64(&a->val, 0, 0); -#elif defined(GIT_BUILTIN_ATOMIC) - return __atomic_load_n(&a->val, __ATOMIC_SEQ_CST); -#elif defined(GIT_BUILTIN_SYNC) - return __sync_val_compare_and_swap(&a->val, 0, 0); -#else -# error "Unsupported architecture for atomic operations" -#endif -} - -#endif - -#else - -#define git_threads_global_init git__noop - -#define git_thread unsigned int -#define git_thread_create(thread, start_routine, arg) git__noop() -#define git_thread_join(id, status) git__noop() - -/* Pthreads Mutex */ -#define git_mutex unsigned int -#define git_mutex_init(a) git__noop() -#define git_mutex_init(a) git__noop() -#define git_mutex_lock(a) git__noop() -#define git_mutex_unlock(a) git__noop() -#define git_mutex_free(a) git__noop() - -/* Pthreads condition vars */ -#define git_cond unsigned int -#define git_cond_init(c) git__noop() -#define git_cond_free(c) git__noop() -#define git_cond_wait(c, l) git__noop() -#define git_cond_signal(c) git__noop() -#define git_cond_broadcast(c) git__noop() - -/* Pthreads rwlock */ -#define git_rwlock unsigned int -#define git_rwlock_init(a) git__noop() -#define git_rwlock_rdlock(a) git__noop() -#define git_rwlock_rdunlock(a) git__noop() -#define git_rwlock_wrlock(a) git__noop() -#define git_rwlock_wrunlock(a) git__noop() -#define git_rwlock_free(a) git__noop() -#define GIT_RWLOCK_STATIC_INIT 0 - - -GIT_INLINE(void) git_atomic32_set(git_atomic32 *a, int val) -{ - a->val = val; -} - -GIT_INLINE(int) git_atomic32_inc(git_atomic32 *a) -{ - return ++a->val; -} - -GIT_INLINE(int) git_atomic32_add(git_atomic32 *a, int32_t addend) -{ - a->val += addend; - return a->val; -} - -GIT_INLINE(int) git_atomic32_dec(git_atomic32 *a) -{ - return --a->val; -} - -GIT_INLINE(int) git_atomic32_get(git_atomic32 *a) -{ - return (int)a->val; -} - -GIT_INLINE(void *) git_atomic__compare_and_swap( - void * volatile *ptr, void *oldval, void *newval) -{ - if (*ptr == oldval) - *ptr = newval; - else - oldval = newval; - return oldval; -} - -GIT_INLINE(volatile void *) git_atomic__swap( - void * volatile *ptr, void *newval) -{ - volatile void *old = *ptr; - *ptr = newval; - return old; -} - -GIT_INLINE(volatile void *) git_atomic__load(void * volatile *ptr) -{ - return *ptr; -} - -#ifdef GIT_ARCH_64 - -GIT_INLINE(int64_t) git_atomic64_add(git_atomic64 *a, int64_t addend) -{ - a->val += addend; - return a->val; -} - -GIT_INLINE(void) git_atomic64_set(git_atomic64 *a, int64_t val) -{ - a->val = val; -} - -GIT_INLINE(int64_t) git_atomic64_get(git_atomic64 *a) -{ - return (int64_t)a->val; -} - -#endif - -#endif - -/* Atomically replace oldval with newval - * @return oldval if it was replaced or newval if it was not - */ -#define git_atomic_compare_and_swap(P,O,N) \ - git_atomic__compare_and_swap((void * volatile *)P, O, N) - -#define git_atomic_swap(ptr, val) \ - (void *)git_atomic__swap((void * volatile *)&ptr, val) - -#define git_atomic_load(ptr) \ - (void *)git_atomic__load((void * volatile *)&ptr) - -#if defined(GIT_THREADS) - -# if defined(GIT_WIN32) -# define GIT_MEMORY_BARRIER MemoryBarrier() -# elif defined(GIT_BUILTIN_ATOMIC) -# define GIT_MEMORY_BARRIER __atomic_thread_fence(__ATOMIC_SEQ_CST) -# elif defined(GIT_BUILTIN_SYNC) -# define GIT_MEMORY_BARRIER __sync_synchronize() -# endif - -#else - -# define GIT_MEMORY_BARRIER /* noop */ - -#endif - -#endif |
