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Diffstat (limited to 'src/dpdk22/lib/librte_eal/common/include/generic/rte_atomic.h')
| -rw-r--r-- | src/dpdk22/lib/librte_eal/common/include/generic/rte_atomic.h | 945 |
1 files changed, 0 insertions, 945 deletions
diff --git a/src/dpdk22/lib/librte_eal/common/include/generic/rte_atomic.h b/src/dpdk22/lib/librte_eal/common/include/generic/rte_atomic.h deleted file mode 100644 index 26d1f56d..00000000 --- a/src/dpdk22/lib/librte_eal/common/include/generic/rte_atomic.h +++ /dev/null @@ -1,945 +0,0 @@ -/*- - * BSD LICENSE - * - * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * 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. - * * Neither the name of Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * 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 _RTE_ATOMIC_H_ -#define _RTE_ATOMIC_H_ - -/** - * @file - * Atomic Operations - * - * This file defines a generic API for atomic operations. - */ - -#include <stdint.h> - -#ifdef __DOXYGEN__ - -/** - * General memory barrier. - * - * Guarantees that the LOAD and STORE operations generated before the - * barrier occur before the LOAD and STORE operations generated after. - * This function is architecture dependent. - */ -static inline void rte_mb(void); - -/** - * Write memory barrier. - * - * Guarantees that the STORE operations generated before the barrier - * occur before the STORE operations generated after. - * This function is architecture dependent. - */ -static inline void rte_wmb(void); - -/** - * Read memory barrier. - * - * Guarantees that the LOAD operations generated before the barrier - * occur before the LOAD operations generated after. - * This function is architecture dependent. - */ -static inline void rte_rmb(void); - -/** - * General memory barrier between lcores - * - * Guarantees that the LOAD and STORE operations that precede the - * rte_smp_mb() call are globally visible across the lcores - * before the the LOAD and STORE operations that follows it. - */ -static inline void rte_smp_mb(void); - -/** - * Write memory barrier between lcores - * - * Guarantees that the STORE operations that precede the - * rte_smp_wmb() call are globally visible across the lcores - * before the the STORE operations that follows it. - */ -static inline void rte_smp_wmb(void); - -/** - * Read memory barrier between lcores - * - * Guarantees that the LOAD operations that precede the - * rte_smp_rmb() call are globally visible across the lcores - * before the the LOAD operations that follows it. - */ -static inline void rte_smp_rmb(void); - -#endif /* __DOXYGEN__ */ - -/** - * Compiler barrier. - * - * Guarantees that operation reordering does not occur at compile time - * for operations directly before and after the barrier. - */ -#define rte_compiler_barrier() do { \ - asm volatile ("" : : : "memory"); \ -} while(0) - -/*------------------------- 16 bit atomic operations -------------------------*/ - -/** - * Atomic compare and set. - * - * (atomic) equivalent to: - * if (*dst == exp) - * *dst = src (all 16-bit words) - * - * @param dst - * The destination location into which the value will be written. - * @param exp - * The expected value. - * @param src - * The new value. - * @return - * Non-zero on success; 0 on failure. - */ -static inline int -rte_atomic16_cmpset(volatile uint16_t *dst, uint16_t exp, uint16_t src); - -#ifdef RTE_FORCE_INTRINSICS -static inline int -rte_atomic16_cmpset(volatile uint16_t *dst, uint16_t exp, uint16_t src) -{ - return __sync_bool_compare_and_swap(dst, exp, src); -} -#endif - -/** - * The atomic counter structure. - */ -typedef struct { - volatile int16_t cnt; /**< An internal counter value. */ -} rte_atomic16_t; - -/** - * Static initializer for an atomic counter. - */ -#define RTE_ATOMIC16_INIT(val) { (val) } - -/** - * Initialize an atomic counter. - * - * @param v - * A pointer to the atomic counter. - */ -static inline void -rte_atomic16_init(rte_atomic16_t *v) -{ - v->cnt = 0; -} - -/** - * Atomically read a 16-bit value from a counter. - * - * @param v - * A pointer to the atomic counter. - * @return - * The value of the counter. - */ -static inline int16_t -rte_atomic16_read(const rte_atomic16_t *v) -{ - return v->cnt; -} - -/** - * Atomically set a counter to a 16-bit value. - * - * @param v - * A pointer to the atomic counter. - * @param new_value - * The new value for the counter. - */ -static inline void -rte_atomic16_set(rte_atomic16_t *v, int16_t new_value) -{ - v->cnt = new_value; -} - -/** - * Atomically add a 16-bit value to an atomic counter. - * - * @param v - * A pointer to the atomic counter. - * @param inc - * The value to be added to the counter. - */ -static inline void -rte_atomic16_add(rte_atomic16_t *v, int16_t inc) -{ - __sync_fetch_and_add(&v->cnt, inc); -} - -/** - * Atomically subtract a 16-bit value from an atomic counter. - * - * @param v - * A pointer to the atomic counter. - * @param dec - * The value to be subtracted from the counter. - */ -static inline void -rte_atomic16_sub(rte_atomic16_t *v, int16_t dec) -{ - __sync_fetch_and_sub(&v->cnt, dec); -} - -/** - * Atomically increment a counter by one. - * - * @param v - * A pointer to the atomic counter. - */ -static inline void -rte_atomic16_inc(rte_atomic16_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline void -rte_atomic16_inc(rte_atomic16_t *v) -{ - rte_atomic16_add(v, 1); -} -#endif - -/** - * Atomically decrement a counter by one. - * - * @param v - * A pointer to the atomic counter. - */ -static inline void -rte_atomic16_dec(rte_atomic16_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline void -rte_atomic16_dec(rte_atomic16_t *v) -{ - rte_atomic16_sub(v, 1); -} -#endif - -/** - * Atomically add a 16-bit value to a counter and return the result. - * - * Atomically adds the 16-bits value (inc) to the atomic counter (v) and - * returns the value of v after addition. - * - * @param v - * A pointer to the atomic counter. - * @param inc - * The value to be added to the counter. - * @return - * The value of v after the addition. - */ -static inline int16_t -rte_atomic16_add_return(rte_atomic16_t *v, int16_t inc) -{ - return __sync_add_and_fetch(&v->cnt, inc); -} - -/** - * Atomically subtract a 16-bit value from a counter and return - * the result. - * - * Atomically subtracts the 16-bit value (inc) from the atomic counter - * (v) and returns the value of v after the subtraction. - * - * @param v - * A pointer to the atomic counter. - * @param dec - * The value to be subtracted from the counter. - * @return - * The value of v after the subtraction. - */ -static inline int16_t -rte_atomic16_sub_return(rte_atomic16_t *v, int16_t dec) -{ - return __sync_sub_and_fetch(&v->cnt, dec); -} - -/** - * Atomically increment a 16-bit counter by one and test. - * - * Atomically increments the atomic counter (v) by one and returns true if - * the result is 0, or false in all other cases. - * - * @param v - * A pointer to the atomic counter. - * @return - * True if the result after the increment operation is 0; false otherwise. - */ -static inline int rte_atomic16_inc_and_test(rte_atomic16_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline int rte_atomic16_inc_and_test(rte_atomic16_t *v) -{ - return (__sync_add_and_fetch(&v->cnt, 1) == 0); -} -#endif - -/** - * Atomically decrement a 16-bit counter by one and test. - * - * Atomically decrements the atomic counter (v) by one and returns true if - * the result is 0, or false in all other cases. - * - * @param v - * A pointer to the atomic counter. - * @return - * True if the result after the decrement operation is 0; false otherwise. - */ -static inline int rte_atomic16_dec_and_test(rte_atomic16_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline int rte_atomic16_dec_and_test(rte_atomic16_t *v) -{ - return (__sync_sub_and_fetch(&v->cnt, 1) == 0); -} -#endif - -/** - * Atomically test and set a 16-bit atomic counter. - * - * If the counter value is already set, return 0 (failed). Otherwise, set - * the counter value to 1 and return 1 (success). - * - * @param v - * A pointer to the atomic counter. - * @return - * 0 if failed; else 1, success. - */ -static inline int rte_atomic16_test_and_set(rte_atomic16_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline int rte_atomic16_test_and_set(rte_atomic16_t *v) -{ - return rte_atomic16_cmpset((volatile uint16_t *)&v->cnt, 0, 1); -} -#endif - -/** - * Atomically set a 16-bit counter to 0. - * - * @param v - * A pointer to the atomic counter. - */ -static inline void rte_atomic16_clear(rte_atomic16_t *v) -{ - v->cnt = 0; -} - -/*------------------------- 32 bit atomic operations -------------------------*/ - -/** - * Atomic compare and set. - * - * (atomic) equivalent to: - * if (*dst == exp) - * *dst = src (all 32-bit words) - * - * @param dst - * The destination location into which the value will be written. - * @param exp - * The expected value. - * @param src - * The new value. - * @return - * Non-zero on success; 0 on failure. - */ -static inline int -rte_atomic32_cmpset(volatile uint32_t *dst, uint32_t exp, uint32_t src); - -#ifdef RTE_FORCE_INTRINSICS -static inline int -rte_atomic32_cmpset(volatile uint32_t *dst, uint32_t exp, uint32_t src) -{ - return __sync_bool_compare_and_swap(dst, exp, src); -} -#endif - -/** - * The atomic counter structure. - */ -typedef struct { - volatile int32_t cnt; /**< An internal counter value. */ -} rte_atomic32_t; - -/** - * Static initializer for an atomic counter. - */ -#define RTE_ATOMIC32_INIT(val) { (val) } - -/** - * Initialize an atomic counter. - * - * @param v - * A pointer to the atomic counter. - */ -static inline void -rte_atomic32_init(rte_atomic32_t *v) -{ - v->cnt = 0; -} - -/** - * Atomically read a 32-bit value from a counter. - * - * @param v - * A pointer to the atomic counter. - * @return - * The value of the counter. - */ -static inline int32_t -rte_atomic32_read(const rte_atomic32_t *v) -{ - return v->cnt; -} - -/** - * Atomically set a counter to a 32-bit value. - * - * @param v - * A pointer to the atomic counter. - * @param new_value - * The new value for the counter. - */ -static inline void -rte_atomic32_set(rte_atomic32_t *v, int32_t new_value) -{ - v->cnt = new_value; -} - -/** - * Atomically add a 32-bit value to an atomic counter. - * - * @param v - * A pointer to the atomic counter. - * @param inc - * The value to be added to the counter. - */ -static inline void -rte_atomic32_add(rte_atomic32_t *v, int32_t inc) -{ - __sync_fetch_and_add(&v->cnt, inc); -} - -/** - * Atomically subtract a 32-bit value from an atomic counter. - * - * @param v - * A pointer to the atomic counter. - * @param dec - * The value to be subtracted from the counter. - */ -static inline void -rte_atomic32_sub(rte_atomic32_t *v, int32_t dec) -{ - __sync_fetch_and_sub(&v->cnt, dec); -} - -/** - * Atomically increment a counter by one. - * - * @param v - * A pointer to the atomic counter. - */ -static inline void -rte_atomic32_inc(rte_atomic32_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline void -rte_atomic32_inc(rte_atomic32_t *v) -{ - rte_atomic32_add(v, 1); -} -#endif - -/** - * Atomically decrement a counter by one. - * - * @param v - * A pointer to the atomic counter. - */ -static inline void -rte_atomic32_dec(rte_atomic32_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline void -rte_atomic32_dec(rte_atomic32_t *v) -{ - rte_atomic32_sub(v,1); -} -#endif - -/** - * Atomically add a 32-bit value to a counter and return the result. - * - * Atomically adds the 32-bits value (inc) to the atomic counter (v) and - * returns the value of v after addition. - * - * @param v - * A pointer to the atomic counter. - * @param inc - * The value to be added to the counter. - * @return - * The value of v after the addition. - */ -static inline int32_t -rte_atomic32_add_return(rte_atomic32_t *v, int32_t inc) -{ - return __sync_add_and_fetch(&v->cnt, inc); -} - -/** - * Atomically subtract a 32-bit value from a counter and return - * the result. - * - * Atomically subtracts the 32-bit value (inc) from the atomic counter - * (v) and returns the value of v after the subtraction. - * - * @param v - * A pointer to the atomic counter. - * @param dec - * The value to be subtracted from the counter. - * @return - * The value of v after the subtraction. - */ -static inline int32_t -rte_atomic32_sub_return(rte_atomic32_t *v, int32_t dec) -{ - return __sync_sub_and_fetch(&v->cnt, dec); -} - -/** - * Atomically increment a 32-bit counter by one and test. - * - * Atomically increments the atomic counter (v) by one and returns true if - * the result is 0, or false in all other cases. - * - * @param v - * A pointer to the atomic counter. - * @return - * True if the result after the increment operation is 0; false otherwise. - */ -static inline int rte_atomic32_inc_and_test(rte_atomic32_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline int rte_atomic32_inc_and_test(rte_atomic32_t *v) -{ - return (__sync_add_and_fetch(&v->cnt, 1) == 0); -} -#endif - -/** - * Atomically decrement a 32-bit counter by one and test. - * - * Atomically decrements the atomic counter (v) by one and returns true if - * the result is 0, or false in all other cases. - * - * @param v - * A pointer to the atomic counter. - * @return - * True if the result after the decrement operation is 0; false otherwise. - */ -static inline int rte_atomic32_dec_and_test(rte_atomic32_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline int rte_atomic32_dec_and_test(rte_atomic32_t *v) -{ - return (__sync_sub_and_fetch(&v->cnt, 1) == 0); -} -#endif - -/** - * Atomically test and set a 32-bit atomic counter. - * - * If the counter value is already set, return 0 (failed). Otherwise, set - * the counter value to 1 and return 1 (success). - * - * @param v - * A pointer to the atomic counter. - * @return - * 0 if failed; else 1, success. - */ -static inline int rte_atomic32_test_and_set(rte_atomic32_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline int rte_atomic32_test_and_set(rte_atomic32_t *v) -{ - return rte_atomic32_cmpset((volatile uint32_t *)&v->cnt, 0, 1); -} -#endif - -/** - * Atomically set a 32-bit counter to 0. - * - * @param v - * A pointer to the atomic counter. - */ -static inline void rte_atomic32_clear(rte_atomic32_t *v) -{ - v->cnt = 0; -} - -/*------------------------- 64 bit atomic operations -------------------------*/ - -/** - * An atomic compare and set function used by the mutex functions. - * (atomic) equivalent to: - * if (*dst == exp) - * *dst = src (all 64-bit words) - * - * @param dst - * The destination into which the value will be written. - * @param exp - * The expected value. - * @param src - * The new value. - * @return - * Non-zero on success; 0 on failure. - */ -static inline int -rte_atomic64_cmpset(volatile uint64_t *dst, uint64_t exp, uint64_t src); - -#ifdef RTE_FORCE_INTRINSICS -static inline int -rte_atomic64_cmpset(volatile uint64_t *dst, uint64_t exp, uint64_t src) -{ - return __sync_bool_compare_and_swap(dst, exp, src); -} -#endif - -/** - * The atomic counter structure. - */ -typedef struct { - volatile int64_t cnt; /**< Internal counter value. */ -} rte_atomic64_t; - -/** - * Static initializer for an atomic counter. - */ -#define RTE_ATOMIC64_INIT(val) { (val) } - -/** - * Initialize the atomic counter. - * - * @param v - * A pointer to the atomic counter. - */ -static inline void -rte_atomic64_init(rte_atomic64_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline void -rte_atomic64_init(rte_atomic64_t *v) -{ -#ifdef __LP64__ - v->cnt = 0; -#else - int success = 0; - uint64_t tmp; - - while (success == 0) { - tmp = v->cnt; - success = rte_atomic64_cmpset((volatile uint64_t *)&v->cnt, - tmp, 0); - } -#endif -} -#endif - -/** - * Atomically read a 64-bit counter. - * - * @param v - * A pointer to the atomic counter. - * @return - * The value of the counter. - */ -static inline int64_t -rte_atomic64_read(rte_atomic64_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline int64_t -rte_atomic64_read(rte_atomic64_t *v) -{ -#ifdef __LP64__ - return v->cnt; -#else - int success = 0; - uint64_t tmp; - - while (success == 0) { - tmp = v->cnt; - /* replace the value by itself */ - success = rte_atomic64_cmpset((volatile uint64_t *)&v->cnt, - tmp, tmp); - } - return tmp; -#endif -} -#endif - -/** - * Atomically set a 64-bit counter. - * - * @param v - * A pointer to the atomic counter. - * @param new_value - * The new value of the counter. - */ -static inline void -rte_atomic64_set(rte_atomic64_t *v, int64_t new_value); - -#ifdef RTE_FORCE_INTRINSICS -static inline void -rte_atomic64_set(rte_atomic64_t *v, int64_t new_value) -{ -#ifdef __LP64__ - v->cnt = new_value; -#else - int success = 0; - uint64_t tmp; - - while (success == 0) { - tmp = v->cnt; - success = rte_atomic64_cmpset((volatile uint64_t *)&v->cnt, - tmp, new_value); - } -#endif -} -#endif - -/** - * Atomically add a 64-bit value to a counter. - * - * @param v - * A pointer to the atomic counter. - * @param inc - * The value to be added to the counter. - */ -static inline void -rte_atomic64_add(rte_atomic64_t *v, int64_t inc); - -#ifdef RTE_FORCE_INTRINSICS -static inline void -rte_atomic64_add(rte_atomic64_t *v, int64_t inc) -{ - __sync_fetch_and_add(&v->cnt, inc); -} -#endif - -/** - * Atomically subtract a 64-bit value from a counter. - * - * @param v - * A pointer to the atomic counter. - * @param dec - * The value to be subtracted from the counter. - */ -static inline void -rte_atomic64_sub(rte_atomic64_t *v, int64_t dec); - -#ifdef RTE_FORCE_INTRINSICS -static inline void -rte_atomic64_sub(rte_atomic64_t *v, int64_t dec) -{ - __sync_fetch_and_sub(&v->cnt, dec); -} -#endif - -/** - * Atomically increment a 64-bit counter by one and test. - * - * @param v - * A pointer to the atomic counter. - */ -static inline void -rte_atomic64_inc(rte_atomic64_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline void -rte_atomic64_inc(rte_atomic64_t *v) -{ - rte_atomic64_add(v, 1); -} -#endif - -/** - * Atomically decrement a 64-bit counter by one and test. - * - * @param v - * A pointer to the atomic counter. - */ -static inline void -rte_atomic64_dec(rte_atomic64_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline void -rte_atomic64_dec(rte_atomic64_t *v) -{ - rte_atomic64_sub(v, 1); -} -#endif - -/** - * Add a 64-bit value to an atomic counter and return the result. - * - * Atomically adds the 64-bit value (inc) to the atomic counter (v) and - * returns the value of v after the addition. - * - * @param v - * A pointer to the atomic counter. - * @param inc - * The value to be added to the counter. - * @return - * The value of v after the addition. - */ -static inline int64_t -rte_atomic64_add_return(rte_atomic64_t *v, int64_t inc); - -#ifdef RTE_FORCE_INTRINSICS -static inline int64_t -rte_atomic64_add_return(rte_atomic64_t *v, int64_t inc) -{ - return __sync_add_and_fetch(&v->cnt, inc); -} -#endif - -/** - * Subtract a 64-bit value from an atomic counter and return the result. - * - * Atomically subtracts the 64-bit value (dec) from the atomic counter (v) - * and returns the value of v after the subtraction. - * - * @param v - * A pointer to the atomic counter. - * @param dec - * The value to be subtracted from the counter. - * @return - * The value of v after the subtraction. - */ -static inline int64_t -rte_atomic64_sub_return(rte_atomic64_t *v, int64_t dec); - -#ifdef RTE_FORCE_INTRINSICS -static inline int64_t -rte_atomic64_sub_return(rte_atomic64_t *v, int64_t dec) -{ - return __sync_sub_and_fetch(&v->cnt, dec); -} -#endif - -/** - * Atomically increment a 64-bit counter by one and test. - * - * Atomically increments the atomic counter (v) by one and returns - * true if the result is 0, or false in all other cases. - * - * @param v - * A pointer to the atomic counter. - * @return - * True if the result after the addition is 0; false otherwise. - */ -static inline int rte_atomic64_inc_and_test(rte_atomic64_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline int rte_atomic64_inc_and_test(rte_atomic64_t *v) -{ - return rte_atomic64_add_return(v, 1) == 0; -} -#endif - -/** - * Atomically decrement a 64-bit counter by one and test. - * - * Atomically decrements the atomic counter (v) by one and returns true if - * the result is 0, or false in all other cases. - * - * @param v - * A pointer to the atomic counter. - * @return - * True if the result after subtraction is 0; false otherwise. - */ -static inline int rte_atomic64_dec_and_test(rte_atomic64_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline int rte_atomic64_dec_and_test(rte_atomic64_t *v) -{ - return rte_atomic64_sub_return(v, 1) == 0; -} -#endif - -/** - * Atomically test and set a 64-bit atomic counter. - * - * If the counter value is already set, return 0 (failed). Otherwise, set - * the counter value to 1 and return 1 (success). - * - * @param v - * A pointer to the atomic counter. - * @return - * 0 if failed; else 1, success. - */ -static inline int rte_atomic64_test_and_set(rte_atomic64_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline int rte_atomic64_test_and_set(rte_atomic64_t *v) -{ - return rte_atomic64_cmpset((volatile uint64_t *)&v->cnt, 0, 1); -} -#endif - -/** - * Atomically set a 64-bit counter to 0. - * - * @param v - * A pointer to the atomic counter. - */ -static inline void rte_atomic64_clear(rte_atomic64_t *v); - -#ifdef RTE_FORCE_INTRINSICS -static inline void rte_atomic64_clear(rte_atomic64_t *v) -{ - rte_atomic64_set(v, 0); -} -#endif - -#endif /* _RTE_ATOMIC_H_ */ |