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Diffstat (limited to 'fluent-bit/lib/librdkafka-2.1.0/src/rdatomic.h')
| -rw-r--r-- | fluent-bit/lib/librdkafka-2.1.0/src/rdatomic.h | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/fluent-bit/lib/librdkafka-2.1.0/src/rdatomic.h b/fluent-bit/lib/librdkafka-2.1.0/src/rdatomic.h new file mode 100644 index 000000000..aa7d3d770 --- /dev/null +++ b/fluent-bit/lib/librdkafka-2.1.0/src/rdatomic.h @@ -0,0 +1,226 @@ +/* + * librdkafka - The Apache Kafka C/C++ library + * + * Copyright (c) 2014-2016 Magnus Edenhill + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef _RDATOMIC_H_ +#define _RDATOMIC_H_ + +#include "tinycthread.h" + +typedef struct { + int32_t val; +#if !defined(_WIN32) && !HAVE_ATOMICS_32 + mtx_t lock; +#endif +} rd_atomic32_t; + +typedef struct { + int64_t val; +#if !defined(_WIN32) && !HAVE_ATOMICS_64 + mtx_t lock; +#endif +} rd_atomic64_t; + + +static RD_INLINE RD_UNUSED void rd_atomic32_init(rd_atomic32_t *ra, int32_t v) { + ra->val = v; +#if !defined(_WIN32) && !HAVE_ATOMICS_32 + mtx_init(&ra->lock, mtx_plain); +#endif +} + + +static RD_INLINE int32_t RD_UNUSED rd_atomic32_add(rd_atomic32_t *ra, + int32_t v) { +#ifdef __SUNPRO_C + return atomic_add_32_nv(&ra->val, v); +#elif defined(_WIN32) + return InterlockedAdd((LONG *)&ra->val, v); +#elif !HAVE_ATOMICS_32 + int32_t r; + mtx_lock(&ra->lock); + ra->val += v; + r = ra->val; + mtx_unlock(&ra->lock); + return r; +#else + return ATOMIC_OP32(add, fetch, &ra->val, v); +#endif +} + +static RD_INLINE int32_t RD_UNUSED rd_atomic32_sub(rd_atomic32_t *ra, + int32_t v) { +#ifdef __SUNPRO_C + return atomic_add_32_nv(&ra->val, -v); +#elif defined(_WIN32) + return InterlockedAdd((LONG *)&ra->val, -v); +#elif !HAVE_ATOMICS_32 + int32_t r; + mtx_lock(&ra->lock); + ra->val -= v; + r = ra->val; + mtx_unlock(&ra->lock); + return r; +#else + return ATOMIC_OP32(sub, fetch, &ra->val, v); +#endif +} + +/** + * @warning The returned value is the nominal value and will be outdated + * by the time the application reads it. + * It should not be used for exact arithmetics, any correlation + * with other data is unsynchronized, meaning that two atomics, + * or one atomic and a mutex-protected piece of data have no + * common synchronization and can't be relied on. + */ +static RD_INLINE int32_t RD_UNUSED rd_atomic32_get(rd_atomic32_t *ra) { +#if defined(_WIN32) || defined(__SUNPRO_C) + return ra->val; +#elif !HAVE_ATOMICS_32 + int32_t r; + mtx_lock(&ra->lock); + r = ra->val; + mtx_unlock(&ra->lock); + return r; +#else + return ATOMIC_OP32(fetch, add, &ra->val, 0); +#endif +} + +static RD_INLINE int32_t RD_UNUSED rd_atomic32_set(rd_atomic32_t *ra, + int32_t v) { +#ifdef _WIN32 + return InterlockedExchange((LONG *)&ra->val, v); +#elif !HAVE_ATOMICS_32 + int32_t r; + mtx_lock(&ra->lock); + r = ra->val = v; + mtx_unlock(&ra->lock); + return r; +#elif HAVE_ATOMICS_32_ATOMIC + __atomic_store_n(&ra->val, v, __ATOMIC_SEQ_CST); + return v; +#elif HAVE_ATOMICS_32_SYNC + (void)__sync_lock_test_and_set(&ra->val, v); + return v; +#else + return ra->val = v; // FIXME +#endif +} + + + +static RD_INLINE RD_UNUSED void rd_atomic64_init(rd_atomic64_t *ra, int64_t v) { + ra->val = v; +#if !defined(_WIN32) && !HAVE_ATOMICS_64 + mtx_init(&ra->lock, mtx_plain); +#endif +} + +static RD_INLINE int64_t RD_UNUSED rd_atomic64_add(rd_atomic64_t *ra, + int64_t v) { +#ifdef __SUNPRO_C + return atomic_add_64_nv(&ra->val, v); +#elif defined(_WIN32) + return InterlockedAdd64(&ra->val, v); +#elif !HAVE_ATOMICS_64 + int64_t r; + mtx_lock(&ra->lock); + ra->val += v; + r = ra->val; + mtx_unlock(&ra->lock); + return r; +#else + return ATOMIC_OP64(add, fetch, &ra->val, v); +#endif +} + +static RD_INLINE int64_t RD_UNUSED rd_atomic64_sub(rd_atomic64_t *ra, + int64_t v) { +#ifdef __SUNPRO_C + return atomic_add_64_nv(&ra->val, -v); +#elif defined(_WIN32) + return InterlockedAdd64(&ra->val, -v); +#elif !HAVE_ATOMICS_64 + int64_t r; + mtx_lock(&ra->lock); + ra->val -= v; + r = ra->val; + mtx_unlock(&ra->lock); + return r; +#else + return ATOMIC_OP64(sub, fetch, &ra->val, v); +#endif +} + +/** + * @warning The returned value is the nominal value and will be outdated + * by the time the application reads it. + * It should not be used for exact arithmetics, any correlation + * with other data is unsynchronized, meaning that two atomics, + * or one atomic and a mutex-protected piece of data have no + * common synchronization and can't be relied on. + * Use with care. + */ +static RD_INLINE int64_t RD_UNUSED rd_atomic64_get(rd_atomic64_t *ra) { +#if defined(_WIN32) || defined(__SUNPRO_C) + return InterlockedCompareExchange64(&ra->val, 0, 0); +#elif !HAVE_ATOMICS_64 + int64_t r; + mtx_lock(&ra->lock); + r = ra->val; + mtx_unlock(&ra->lock); + return r; +#else + return ATOMIC_OP64(fetch, add, &ra->val, 0); +#endif +} + + +static RD_INLINE int64_t RD_UNUSED rd_atomic64_set(rd_atomic64_t *ra, + int64_t v) { +#ifdef _WIN32 + return InterlockedExchange64(&ra->val, v); +#elif !HAVE_ATOMICS_64 + int64_t r; + mtx_lock(&ra->lock); + ra->val = v; + r = ra->val; + mtx_unlock(&ra->lock); + return r; +#elif HAVE_ATOMICS_64_ATOMIC + __atomic_store_n(&ra->val, v, __ATOMIC_SEQ_CST); + return v; +#elif HAVE_ATOMICS_64_SYNC + (void)__sync_lock_test_and_set(&ra->val, v); + return v; +#else + return ra->val = v; // FIXME +#endif +} + +#endif /* _RDATOMIC_H_ */ |