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• This comparison shows the changes necessary to convert path

  → /trunk/uspace/libc/arch/arm32/include/atomic.h @ 2464

  → /trunk/uspace/libc/arch/arm32/include/atomic.h @ 2465

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• Compare Path:	Rev

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Ignore whitespace Rev 2464 → Rev 2465

/trunk/uspace/libc/arch/arm32/include/atomic.h
1,5 → 1,5
/*
* Copyright (c) 2005 Jakub Jermar
* Copyright (c) 2007 Michal Kebrt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
30,6 → 30,7
* @{
*/
/** @file
* @brief Atomic operations.
*/
#ifndef LIBC_arm32_ATOMIC_H_
37,26 → 38,80
/** Atomic addition.
*
* @param val Atomic value.
* @param imm Value to add.
* @param val Where to add.
* @param i Value to be added.
*
* @return Value after addition.
*/
static inline long atomic_add(atomic_t *val, int imm)
static inline long atomic_add(atomic_t *val, int i)
{
/* TODO */
return (val->count += imm);
int ret;
volatile long * mem = &(val->count);
asm volatile (
"1: \n"
"ldr r2, [%1] \n"
"add r3, r2, %2 \n"
"str r3, %0 \n"
"swp r3, r3, [%1] \n"
"cmp r3, r2 \n"
"bne 1b \n"
: "=m" (ret)
: "r" (mem), "r" (i)
: "r3", "r2"
);
return ret;
}
/** Atomic increment.
*
* @param val Variable to be incremented.
*/
static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); }
/** Atomic decrement.
*
* @param val Variable to be decremented.
*/
static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); }
static inline long atomic_preinc(atomic_t *val) { return atomic_add(val, 1) + 1; }
static inline long atomic_predec(atomic_t *val) { return atomic_add(val, -1) - 1; }
static inline long atomic_postinc(atomic_t *val) { return atomic_add(val, 1); }
static inline long atomic_postdec(atomic_t *val) { return atomic_add(val, -1); }
/** Atomic pre-increment.
*
* @param val Variable to be incremented.
* @return Value after incrementation.
*/
static inline long atomic_preinc(atomic_t *val) { return atomic_add(val, 1); }
/** Atomic pre-decrement.
*
* @param val Variable to be decremented.
* @return Value after decrementation.
*/
static inline long atomic_predec(atomic_t *val) { return atomic_add(val, -1); }
/** Atomic post-increment.
*
* @param val Variable to be incremented.
* @return Value before incrementation.
*/
static inline long atomic_postinc(atomic_t *val) { return atomic_add(val, 1) - 1; }
/** Atomic post-decrement.
*
* @param val Variable to be decremented.
* @return Value before decrementation.
*/
static inline long atomic_postdec(atomic_t *val) { return atomic_add(val, -1) + 1; }
#endif
/** @}