inline assembler question

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To: gcc-help@xxxxxxxxxxx
Subject: inline assembler question
From: gumbold <gumbold@xxxxxxxxxx>
Date: Wed, 18 May 2005 10:28:42 +0300
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Hi

please tell me what it means: #define MBARRIER() __asm__ __volatile__ ("lock; addl $0,0(%%esp)" ::: "memory") #define UNLOCK_MBARRIER() __asm__ __volatile__ ("" ::: "memory")

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