| /* |
| * Copyright (c) 2014-2020 The Linux Foundation. All rights reserved. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for |
| * any purpose with or without fee is hereby granted, provided that the |
| * above copyright notice and this permission notice appear in all |
| * copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| * PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| /** |
| * DOC: i_qdf_atomic.h |
| * This file provides OS dependent atomic APIs. |
| */ |
| |
| #ifndef I_QDF_ATOMIC_H |
| #define I_QDF_ATOMIC_H |
| |
| #include <qdf_status.h> /* QDF_STATUS */ |
| #include <linux/atomic.h> |
| #include <linux/bitops.h> |
| |
| typedef atomic_t __qdf_atomic_t; |
| |
| /** |
| * __qdf_atomic_init() - initialize an atomic type variable |
| * @v: A pointer to an opaque atomic variable |
| * |
| * Return: QDF_STATUS |
| */ |
| static inline QDF_STATUS __qdf_atomic_init(__qdf_atomic_t *v) |
| { |
| atomic_set(v, 0); |
| return QDF_STATUS_SUCCESS; |
| } |
| |
| /** |
| * __qdf_atomic_read() - read the value of an atomic variable |
| * @v: A pointer to an opaque atomic variable |
| * |
| * Return: The current value of the variable |
| */ |
| static inline int32_t __qdf_atomic_read(__qdf_atomic_t *v) |
| { |
| return atomic_read(v); |
| } |
| |
| /** |
| * __qdf_atomic_inc() - increment the value of an atomic variable |
| * @v: A pointer to an opaque atomic variable |
| * |
| * Return: None |
| */ |
| static inline void __qdf_atomic_inc(__qdf_atomic_t *v) |
| { |
| atomic_inc(v); |
| } |
| |
| /** |
| * __qdf_atomic_dec() - decrement the value of an atomic variable |
| * @v: A pointer to an opaque atomic variable |
| * |
| * Return: None |
| */ |
| static inline void __qdf_atomic_dec(__qdf_atomic_t *v) |
| { |
| atomic_dec(v); |
| } |
| |
| /** |
| * __qdf_atomic_add() - add a value to the value of an atomic variable |
| * @i: The amount by which to increase the atomic counter |
| * @v: A pointer to an opaque atomic variable |
| * |
| * Return: None |
| */ |
| static inline void __qdf_atomic_add(int i, __qdf_atomic_t *v) |
| { |
| atomic_add(i, v); |
| } |
| |
| /** |
| * __qdf_atomic_sub() - Subtract a value from an atomic variable |
| * @i: the amount by which to decrease the atomic counter |
| * @v: a pointer to an opaque atomic variable |
| * |
| * Return: none |
| */ |
| static inline void __qdf_atomic_sub(int i, __qdf_atomic_t *v) |
| { |
| atomic_sub(i, v); |
| } |
| |
| /** |
| * __qdf_atomic_dec_and_test() - decrement an atomic variable and check if the |
| * new value is zero |
| * @v: A pointer to an opaque atomic variable |
| * |
| * Return: |
| * true (non-zero) if the new value is zero, |
| * false (0) if the new value is non-zero |
| */ |
| static inline int32_t __qdf_atomic_dec_and_test(__qdf_atomic_t *v) |
| { |
| return atomic_dec_and_test(v); |
| } |
| |
| /** |
| * __qdf_atomic_set() - set a value to the value of an atomic variable |
| * @v: A pointer to an opaque atomic variable |
| * |
| * Return: None |
| */ |
| static inline void __qdf_atomic_set(__qdf_atomic_t *v, int i) |
| { |
| atomic_set(v, i); |
| } |
| |
| /** |
| * __qdf_atomic_inc_return() - return the incremented value of an atomic variable |
| * @v: A pointer to an opaque atomic variable |
| * |
| * Return: The current value of the variable |
| */ |
| static inline int32_t __qdf_atomic_inc_return(__qdf_atomic_t *v) |
| { |
| return atomic_inc_return(v); |
| } |
| |
| /** |
| * __qdf_atomic_dec_return() - return the decremented value of an atomic |
| * variable |
| * @v: A pointer to an opaque atomic variable |
| * |
| * Return: The current value of the variable |
| */ |
| static inline int32_t __qdf_atomic_dec_return(__qdf_atomic_t *v) |
| { |
| return atomic_dec_return(v); |
| } |
| |
| /** |
| * __qdf_atomic_inc_not_zero() - increment if not zero |
| * @v: A pointer to an opaque atomic variable |
| * |
| * Return: Returns non-zero on successful increment and zero otherwise |
| */ |
| static inline int32_t __qdf_atomic_inc_not_zero(__qdf_atomic_t *v) |
| { |
| return atomic_inc_not_zero(v); |
| } |
| |
| /** |
| * __qdf_atomic_set_bit - Atomically set a bit in memory |
| * @nr: bit to set |
| * @addr: the address to start counting from |
| * |
| * Return: none |
| */ |
| static inline void __qdf_atomic_set_bit(int nr, volatile unsigned long *addr) |
| { |
| set_bit(nr, addr); |
| } |
| |
| /** |
| * __qdf_atomic_clear_bit - Atomically clear a bit in memory |
| * @nr: bit to clear |
| * @addr: the address to start counting from |
| * |
| * Return: none |
| */ |
| static inline void __qdf_atomic_clear_bit(int nr, volatile unsigned long *addr) |
| { |
| clear_bit(nr, addr); |
| } |
| |
| /** |
| * __qdf_atomic_change_bit - Atomically toggle a bit in memory |
| * from addr |
| * @nr: bit to change |
| * @addr: the address to start counting from |
| * |
| * Return: none |
| */ |
| static inline void __qdf_atomic_change_bit(int nr, volatile unsigned long *addr) |
| { |
| change_bit(nr, addr); |
| } |
| |
| /** |
| * __qdf_atomic_test_and_set_bit - Atomically set a bit and return its old value |
| * @nr: Bit to set |
| * @addr: the address to start counting from |
| * |
| * Return: return nr bit old value |
| */ |
| static inline int __qdf_atomic_test_and_set_bit(int nr, |
| volatile unsigned long *addr) |
| { |
| return test_and_set_bit(nr, addr); |
| } |
| |
| /** |
| * __qdf_atomic_test_and_clear_bit - Atomically clear a bit and return its old |
| * value |
| * @nr: bit to clear |
| * @addr: the address to start counting from |
| * |
| * Return: return nr bit old value |
| */ |
| static inline int __qdf_atomic_test_and_clear_bit(int nr, |
| volatile unsigned long *addr) |
| { |
| return test_and_clear_bit(nr, addr); |
| } |
| |
| /** |
| * __qdf_atomic_test_and_change_bit - Atomically toggle a bit and return its old |
| * value |
| * @nr: bit to change |
| * @addr: the address to start counting from |
| * |
| * Return: return nr bit old value |
| */ |
| static inline int __qdf_atomic_test_and_change_bit(int nr, |
| volatile unsigned long *addr) |
| { |
| return test_and_change_bit(nr, addr); |
| } |
| |
| /** |
| * __qdf_atomic_test_bit - Atomically get the nr-th bit value starting from addr |
| * @nr: bit to get |
| * @addr: the address to start counting from |
| * |
| * Return: return nr bit value |
| */ |
| static inline int __qdf_atomic_test_bit(int nr, volatile unsigned long *addr) |
| { |
| return test_bit(nr, addr); |
| } |
| |
| #endif |