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
* Revision History
*
* Date Who Description
* 10/06/13 Mark Riddoch Initial implementation
* Date Who Description
* 10/06/13 Mark Riddoch Initial implementation
*
* @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
* atomic add built in function, which is portable across platforms that
* implement GCC. Otherwise, this function currently supports only X86
* architecture (without further development).
*
*
* 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
* location prior to the operation. The number that is added may be signed,
* 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,
* therefore atomic_subtract is merely an atomic add with a negative value.
*
* @param variable Pointer the the variable to add to
* @param value Value to be added
* @return The value of variable before the add occurred
* @param variable Pointer the the variable to add to
* @param value Value to be added
* @return The value of variable before the add occurred
*/
int
atomic_add(int *variable, int value)
{
#ifdef __GNUC__
return (int) __sync_fetch_and_add (variable, value);
#else
asm volatile(
"lock; xaddl %%eax, %2;"
:"=a" (value)
: "a" (value), "m" (*variable)
: "memory" );
return value;
return (int) __sync_fetch_and_add (variable, value);
#else
asm volatile(
"lock; xaddl %%eax, %2;"
:"=a" (value)
: "a" (value), "m" (*variable)
: "memory" );
return value;
#endif
}

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