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Annotation of 43BSD/ingres/source/gutil/xfree.c, revision 1.1

1.1     ! root        1: # include      <sccs.h>
        !             2: 
        !             3: SCCSID(@(#)xfree.c     8.1     12/31/84)
        !             4: 
        !             5: /*
        !             6: **  XFREE -- free memory only if dynamically allocated.
        !             7: **
        !             8: **     This acts just like "free", except that it does nothing
        !             9: **     if the area handed to it hasn't been dynamically allocated.
        !            10: **
        !            11: **     Parameters:
        !            12: **             p -- a pointer to the area to free.
        !            13: **
        !            14: **     Returns:
        !            15: **             none.
        !            16: **
        !            17: **     Side Effects:
        !            18: **             Free memory queue is changed.
        !            19: **
        !            20: **     WARNING:
        !            21: **             This routine depends on the implementation of malloc
        !            22: **             in C; it may have to be changed on other systems.
        !            23: */
        !            24: 
        !            25: xfree(p)
        !            26: char   *p;
        !            27: {
        !            28:        extern char     end[];
        !            29: 
        !            30:        if (p >= end && p < (char *) &p)
        !            31:                free(p);
        !            32: }

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