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/* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/publicdomain/zero/1.0/ */
#ifndef ATOMIC_H_
#define ATOMIC_H_
#include <stdint.h>
// This implements the atomic primatives without any atomicity guarantees. This
// makes the totally unsafe. However we're only using the demuxer in a single
// thread.
namespace stagefright {
static inline int32_t
android_atomic_dec(volatile int32_t* aValue)
{
return (*aValue)--;
}
static inline int32_t
android_atomic_inc(volatile int32_t* aValue)
{
return (*aValue)++;
}
static inline int32_t
android_atomic_or(int32_t aModifier, volatile int32_t* aValue)
{
int32_t ret = *aValue;
*aValue |= aModifier;
return ret;
}
static inline int32_t
android_atomic_add(int32_t aModifier, volatile int32_t* aValue)
{
int32_t ret = *aValue;
*aValue += aModifier;
return ret;
}
static inline int32_t
android_atomic_cmpxchg(int32_t aOld, int32_t aNew, volatile int32_t* aValue)
{
if (*aValue == aOld)
{
return *aValue = aNew;
}
return aOld;
}
}
#endif
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