/****************************************************************************
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** Copyright (C) 1992-2004 Trolltech AS. All rights reserved.
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** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
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#ifndef MIPS_QATOMIC_H
#define MIPS_QATOMIC_H

#include <qglobal.h>

extern "C" {
    Q_CORE_EXPORT int q_atomic_test_and_set_int(volatile int *ptr, int expected, int newval);
    Q_CORE_EXPORT int q_atomic_test_and_set_ptr(volatile void *ptr, void *expected, void *newval);
} // extern "C"

inline int q_atomic_increment(volatile int * const ptr)
{
    register int expected;
    for (;;) {
        expected = *ptr;
        if (q_atomic_test_and_set_int(ptr, expected, expected + 1)) break;
    }
    return expected != -1;
}

inline int q_atomic_decrement(volatile int * const ptr)
{
    register int expected;
    for (;;) {
        expected = *ptr;
        if (q_atomic_test_and_set_int(ptr, expected, expected - 1)) break;
    }
    return expected != 1;
}

inline int q_atomic_set_int(volatile int *ptr, int newval)
{
    register int expected;
    for (;;) {
        expected = *ptr;
        if (q_atomic_test_and_set_int(ptr, expected, newval)) break;
    }
    return expected;
}

inline void *q_atomic_set_ptr(volatile void *ptr, void *newval)
{
    register void *expected;
    for (;;) {
        expected = *reinterpret_cast<void * volatile *>(ptr);
        if (q_atomic_test_and_set_ptr(ptr, expected, newval)) break;
    }
    return expected;
}

#endif // MIPS_QATOMIC_H
