Reindent server/core/atomic.c

This commit is contained in:
Johan Wikman
2015-11-30 10:44:29 +02:00
parent d15508d2d4
commit 6f737d9484
2 changed files with 20 additions and 20 deletions

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@ -22,39 +22,39 @@
* @verbatim * @verbatim
* Revision History * Revision History
* *
* Date Who Description * Date Who Description
* 10/06/13 Mark Riddoch Initial implementation * 10/06/13 Mark Riddoch Initial implementation
* *
* @endverbatim * @endverbatim
*/ */
/** /**
* Implementation of an atomic add operation for the GCC environment, or the * Implementation of an atomic add operation for the GCC environment, or the
* X86 processor. If we are working within GNU C then we can use the GCC * X86 processor. If we are working within GNU C then we can use the GCC
* atomic add built in function, which is portable across platforms that * atomic add built in function, which is portable across platforms that
* implement GCC. Otherwise, this function currently supports only X86 * implement GCC. Otherwise, this function currently supports only X86
* architecture (without further development). * architecture (without further development).
* *
* Adds a value to the contents of a location pointed to by the first parameter. * Adds a value to the contents of a location pointed to by the first parameter.
* The add operation is atomic and the return value is the value stored in the * The add operation is atomic and the return value is the value stored in the
* location prior to the operation. The number that is added may be signed, * location prior to the operation. The number that is added may be signed,
* therefore atomic_subtract is merely an atomic add with a negative value. * therefore atomic_subtract is merely an atomic add with a negative value.
* *
* @param variable Pointer the the variable to add to * @param variable Pointer the the variable to add to
* @param value Value to be added * @param value Value to be added
* @return The value of variable before the add occurred * @return The value of variable before the add occurred
*/ */
int int
atomic_add(int *variable, int value) atomic_add(int *variable, int value)
{ {
#ifdef __GNUC__ #ifdef __GNUC__
return (int) __sync_fetch_and_add (variable, value); return (int) __sync_fetch_and_add (variable, value);
#else #else
asm volatile( asm volatile(
"lock; xaddl %%eax, %2;" "lock; xaddl %%eax, %2;"
:"=a" (value) :"=a" (value)
: "a" (value), "m" (*variable) : "a" (value), "m" (*variable)
: "memory" ); : "memory" );
return value; return value;
#endif #endif
} }

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@ -24,9 +24,9 @@
* @verbatim * @verbatim
* Revision History * Revision History
* *
* Date Who Description * Date Who Description
* 10/06/13 Mark Riddoch Initial implementation * 10/06/13 Mark Riddoch Initial implementation
* 23/06/15 Martin Brampton Alternative for C++ * 23/06/15 Martin Brampton Alternative for C++
* *
* @endverbatim * @endverbatim
*/ */