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base: make FIFO elements zero-pointer save

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fix #904
This commit is contained in:
Martin Stein 2013-10-08 10:40:33 +02:00 committed by Norman Feske
parent d1c0258301
commit 039bae9710
1 changed files with 13 additions and 1 deletions
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14
base/include/util/fifo.h
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@ -14,6 +14,8 @@
#ifndef _INCLUDE__UTIL__FIFO_H_ #ifndef _INCLUDE__UTIL__FIFO_H_
#define _INCLUDE__UTIL__FIFO_H_ #define _INCLUDE__UTIL__FIFO_H_
#include <base/printf.h>
namespace Genode { namespace Genode {
/* /*
@ -166,7 +168,17 @@ namespace Genode {
Fifo_element(T *object) : _object(object) { } Fifo_element(T *object) : _object(object) { }
inline T *object() { return _object; } /**
* Get typed object pointer
*
* Zero-pointer save: Returns 0 if this pointer is 0 to
* cover the case of accessing an empty FIFO.
*/
inline T *object()
{
if (this) { return _object; }
return 0;
}
}; };
} }