Файловый менеджер

Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/arch/x86/include/asm/atomic.h

Назад
/* SPDX-License-Identifier: GPL-2.0 / #ifndef _ASM_X86_ATOMIC_H #define _ASM_X86_ATOMIC_H #include <linux/compiler.h> #include <linux/types.h> #include <asm/alternative.h> #include <asm/cmpxchg.h> #include <asm/rmwcc.h> #include <asm/barrier.h> / * Atomic operations that C can't guarantee us. Useful for * resource counting etc.. / #define ATOMIC_INIT(i) { (i) } /* * arch_atomic_read - read atomic variable * @v: pointer of type atomic_t * * Atomically reads the value of @v. / static __always_inline int arch_atomic_read(const atomic_t v) { /* * Note for KASAN: we deliberately don't use READ_ONCE_NOCHECK() here, * it's non-inlined function that increases binary size and stack usage. / return READ_ONCE((v)->counter); } /* * arch_atomic_set - set atomic variable * @v: pointer of type atomic_t * @i: required value * * Atomically sets the value of @v to @i. / static __always_inline void arch_atomic_set(atomic_t v, int i) { WRITE_ONCE(v->counter, i); } /** * arch_atomic_add - add integer to atomic variable * @i: integer value to add * @v: pointer of type atomic_t * * Atomically adds @i to @v. / static __always_inline void arch_atomic_add(int i, atomic_t v) { asm volatile(LOCK_PREFIX "addl %1,%0" : "+m" (v->counter) : "ir" (i) : "memory"); } /** * arch_atomic_sub - subtract integer from atomic variable * @i: integer value to subtract * @v: pointer of type atomic_t * * Atomically subtracts @i from @v. / static __always_inline void arch_atomic_sub(int i, atomic_t v) { asm volatile(LOCK_PREFIX "subl %1,%0" : "+m" (v->counter) : "ir" (i) : "memory"); } /** * arch_atomic_sub_and_test - subtract value from variable and test result * @i: integer value to subtract * @v: pointer of type atomic_t * * Atomically subtracts @i from @v and returns * true if the result is zero, or false for all * other cases. / static __always_inline bool arch_atomic_sub_and_test(int i, atomic_t v) { return GEN_BINARY_RMWcc(LOCK_PREFIX "subl", v->counter, e, "er", i); } #define arch_atomic_sub_and_test arch_atomic_sub_and_test /** * arch_atomic_inc - increment atomic variable * @v: pointer of type atomic_t * * Atomically increments @v by 1. / static __always_inline void arch_atomic_inc(atomic_t v) { asm volatile(LOCK_PREFIX "incl %0" : "+m" (v->counter) :: "memory"); } #define arch_atomic_inc arch_atomic_inc /** * arch_atomic_dec - decrement atomic variable * @v: pointer of type atomic_t * * Atomically decrements @v by 1. / static __always_inline void arch_atomic_dec(atomic_t v) { asm volatile(LOCK_PREFIX "decl %0" : "+m" (v->counter) :: "memory"); } #define arch_atomic_dec arch_atomic_dec /** * arch_atomic_dec_and_test - decrement and test * @v: pointer of type atomic_t * * Atomically decrements @v by 1 and * returns true if the result is 0, or false for all other * cases. / static __always_inline bool arch_atomic_dec_and_test(atomic_t v) { return GEN_UNARY_RMWcc(LOCK_PREFIX "decl", v->counter, e); } #define arch_atomic_dec_and_test arch_atomic_dec_and_test /** * arch_atomic_inc_and_test - increment and test * @v: pointer of type atomic_t * * Atomically increments @v by 1 * and returns true if the result is zero, or false for all * other cases. / static __always_inline bool arch_atomic_inc_and_test(atomic_t v) { return GEN_UNARY_RMWcc(LOCK_PREFIX "incl", v->counter, e); } #define arch_atomic_inc_and_test arch_atomic_inc_and_test /** * arch_atomic_add_negative - add and test if negative * @i: integer value to add * @v: pointer of type atomic_t * * Atomically adds @i to @v and returns true * if the result is negative, or false when * result is greater than or equal to zero. / static __always_inline bool arch_atomic_add_negative(int i, atomic_t v) { return GEN_BINARY_RMWcc(LOCK_PREFIX "addl", v->counter, s, "er", i); } #define arch_atomic_add_negative arch_atomic_add_negative /** * arch_atomic_add_return - add integer and return * @i: integer value to add * @v: pointer of type atomic_t * * Atomically adds @i to @v and returns @i + @v / static __always_inline int arch_atomic_add_return(int i, atomic_t v) { return i + xadd(&v->counter, i); } /** * arch_atomic_sub_return - subtract integer and return * @v: pointer of type atomic_t * @i: integer value to subtract * * Atomically subtracts @i from @v and returns @v - @i / static __always_inline int arch_atomic_sub_return(int i, atomic_t v) { return arch_atomic_add_return(-i, v); } static __always_inline int arch_atomic_fetch_add(int i, atomic_t v) { return xadd(&v->counter, i); } static __always_inline int arch_atomic_fetch_sub(int i, atomic_t v) { return xadd(&v->counter, -i); } static __always_inline int arch_atomic_cmpxchg(atomic_t v, int old, int new) { return arch_cmpxchg(&v->counter, old, new); } #define arch_atomic_try_cmpxchg arch_atomic_try_cmpxchg static __always_inline bool arch_atomic_try_cmpxchg(atomic_t v, int old, int new) { return try_cmpxchg(&v->counter, old, new); } static inline int arch_atomic_xchg(atomic_t v, int new) { return arch_xchg(&v->counter, new); } static inline void arch_atomic_and(int i, atomic_t v) { asm volatile(LOCK_PREFIX "andl %1,%0" : "+m" (v->counter) : "ir" (i) : "memory"); } static inline int arch_atomic_fetch_and(int i, atomic_t v) { int val = arch_atomic_read(v); do { } while (!arch_atomic_try_cmpxchg(v, &val, val & i)); return val; } static inline void arch_atomic_or(int i, atomic_t v) { asm volatile(LOCK_PREFIX "orl %1,%0" : "+m" (v->counter) : "ir" (i) : "memory"); } static inline int arch_atomic_fetch_or(int i, atomic_t v) { int val = arch_atomic_read(v); do { } while (!arch_atomic_try_cmpxchg(v, &val, val \| i)); return val; } static inline void arch_atomic_xor(int i, atomic_t v) { asm volatile(LOCK_PREFIX "xorl %1,%0" : "+m" (v->counter) : "ir" (i) : "memory"); } static inline int arch_atomic_fetch_xor(int i, atomic_t v) { int val = arch_atomic_read(v); do { } while (!arch_atomic_try_cmpxchg(v, &val, val ^ i)); return val; } #ifdef CONFIG_X86_32 # include <asm/atomic64_32.h> #else # include <asm/atomic64_64.h> #endif #include <asm-generic/atomic-instrumented.h> #endif /* _ASM_X86_ATOMIC_H */

| ver. 1.4 | Github | . | PHP 7.4.3-4ubuntu2.24 | Генерация страницы: 0 | proxy | phpinfo | Настройка