qatomic_sparc.cpp File Reference

#include <QtCore/qatomic.h>
#include <limits.h>
#include <sched.h>

Go to the source code of this file.

Functions
Q_CORE_EXPORT int	q_atomic_lock_int (volatile int *addr)
Q_CORE_EXPORT int	q_atomic_lock_ptr (volatile void *addr)
int	q_atomic_trylock_int (volatile int *addr)
int	q_atomic_trylock_ptr (volatile void *addr)

Function Documentation

q_atomic_lock_int()

Q_CORE_EXPORT int q_atomic_lock_int

(

volatile int *

addr

)

Definition at line 52 of file qatomic_sparc.cpp.

{
    int returnValue = q_atomic_trylock_int(addr);

    if (returnValue == INT_MIN) {
        do {
            // spin until we think we can succeed
            do {
                sched_yield();
                returnValue = *addr;
            } while (returnValue == INT_MIN);
            
            // try again
            returnValue = q_atomic_trylock_int(addr);
        } while (returnValue == INT_MIN);
    }

    return returnValue;
}

q_atomic_lock_ptr()

Q_CORE_EXPORT int q_atomic_lock_ptr

(

volatile void *

addr

)

Definition at line 72 of file qatomic_sparc.cpp.

{
    int returnValue = q_atomic_trylock_ptr(addr);

    if (returnValue == -1) {
        do {
            // spin until we think we can succeed
            do {
                sched_yield();
                returnValue = *reinterpret_cast<volatile int *>(addr);
            } while (returnValue == -1);

            // try again
            returnValue = q_atomic_trylock_ptr(addr);
        } while (returnValue == -1);
    }

    return returnValue;
}

q_atomic_trylock_int()

int q_atomic_trylock_int

(

volatile int *

addr

)

Referenced by q_atomic_lock_int().

q_atomic_trylock_ptr()

int q_atomic_trylock_ptr

(

volatile void *

addr

)

Referenced by q_atomic_lock_ptr().