Macros
#define	Q_ATOMIC_INT_FETCH_AND_ADD_IS_NOT_NATIVE

#define	Q_ATOMIC_INT_FETCH_AND_STORE_IS_NOT_NATIVE

#define	Q_ATOMIC_INT_REFERENCE_COUNTING_IS_NOT_NATIVE

#define	Q_ATOMIC_INT_TEST_AND_SET_IS_NOT_NATIVE

#define	Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_NOT_NATIVE

#define	Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_NOT_NATIVE

#define	Q_ATOMIC_POINTER_TEST_AND_SET_IS_NOT_NATIVE

Functions
int	qt_atomic_tasb (volatile char *ptr)

Q_CORE_EXPORT void	qt_atomic_yield (int *count)

Variables
Q_CORE_EXPORT volatile char	qt_atomic_lock

Macro Definition Documentation

◆ Q_ATOMIC_INT_FETCH_AND_ADD_IS_NOT_NATIVE

#define Q_ATOMIC_INT_FETCH_AND_ADD_IS_NOT_NATIVE

Definition at line 70 of file qatomic_sh.h.

◆ Q_ATOMIC_INT_FETCH_AND_STORE_IS_NOT_NATIVE

#define Q_ATOMIC_INT_FETCH_AND_STORE_IS_NOT_NATIVE

Definition at line 63 of file qatomic_sh.h.

◆ Q_ATOMIC_INT_REFERENCE_COUNTING_IS_NOT_NATIVE

#define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_NOT_NATIVE

Definition at line 49 of file qatomic_sh.h.

◆ Q_ATOMIC_INT_TEST_AND_SET_IS_NOT_NATIVE

#define Q_ATOMIC_INT_TEST_AND_SET_IS_NOT_NATIVE

Definition at line 56 of file qatomic_sh.h.

◆ Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_NOT_NATIVE

#define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_NOT_NATIVE

Definition at line 95 of file qatomic_sh.h.

◆ Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_NOT_NATIVE

#define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_NOT_NATIVE

Definition at line 86 of file qatomic_sh.h.

◆ Q_ATOMIC_POINTER_TEST_AND_SET_IS_NOT_NATIVE

#define Q_ATOMIC_POINTER_TEST_AND_SET_IS_NOT_NATIVE

Definition at line 77 of file qatomic_sh.h.

Function Documentation

◆ qt_atomic_tasb()

int qt_atomic_tasb ( volatile char * ptr )

inline

Definition at line 107 of file qatomic_sh.h.

 {
     register int ret;
     asm volatile("tas.b @%2\n"
                  "movt  %0"
                  : "=&r"(ret), "=m"(*ptr)
                  : "r"(ptr)
                  : "cc", "memory");
     return ret;
 }

◆ qt_atomic_yield()

Q_CORE_EXPORT void qt_atomic_yield ( int * count )

Definition at line 56 of file qatomic_arm.cpp.

Referenced by qt_atomic_tasb().

 {
 #ifdef _POSIX_PRIORITY_SCHEDULING
     if((*count)++ < 50) {
         sched_yield();
     } else
 #endif
     {
         struct timespec tm;
         tm.tv_sec = 0;
         tm.tv_nsec = 2000001;
         nanosleep(&tm, NULL);
         *count = 0;
     }
 }

Variable Documentation

◆ qt_atomic_lock

Q_CORE_EXPORT volatile char qt_atomic_lock

Definition at line 54 of file qatomic_sh.cpp.