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Annotation of 43BSD/ingres/source/gutil/xfree.c, revision 1.1.1.1

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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