Subject:
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IS free()'s operation atomic?
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Thu, 29 Apr 1999 13:00:05 GMT
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Viewed:
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1136 times
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Hi all
I think that free() operation in mm.c is not ISR safe in multitasking
mode. This operation is not keep coherence about value of
mm_first_free,is it?
------------ in mm.c -----------------
// for task safe operations, free needs to be
// atomic and nonblocking, because it may be
// called by the scheduler.
//
// therefore, just update mm_first_free
//
if(ptr<mm_first_free || mm_first_free<&mm_start)
mm_first_free=ptr;
----------------------------------------
Please any advice me.
Thanks.
Jiro Eto
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