git.distorted.org.uk Git - u/mdw/putty/blob - misc.c

   1 #include <windows.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include "putty.h"
   5
   6 /* My own versions of malloc, realloc and free. Because I want malloc and
   7  * realloc to bomb out and exit the program if they run out of memory,
   8  * realloc to reliably call malloc if passed a NULL pointer, and free
   9  * to reliably do nothing if passed a NULL pointer. Of course we can also
  10  * put trace printouts in, if we need to. */
  11
  12 #ifdef MALLOC_LOG
  13 static FILE *fp = NULL;
  14
  15 void mlog(char *file, int line) {
  16     if (!fp) {
  17         fp = fopen("putty_mem.log", "w");
  18         setvbuf(fp, NULL, _IONBF, BUFSIZ);
  19     }
  20     if (fp)
  21         fprintf (fp, "%s:%d: ", file, line);
  22 }
  23 #endif
  24
  25 void *safemalloc(size_t size) {
  26     void *p = malloc (size);
  27     if (!p) {
  28         MessageBox(NULL, "Out of memory!", "PuTTY Fatal Error",
  29                    MB_SYSTEMMODAL | MB_ICONERROR | MB_OK);
  30         exit(1);
  31     }
  32 #ifdef MALLOC_LOG
  33     if (fp)
  34         fprintf(fp, "malloc(%d) returns %p\n", size, p);
  35 #endif
  36     return p;
  37 }
  38
  39 void *saferealloc(void *ptr, size_t size) {
  40     void *p;
  41     if (!ptr)
  42         p = malloc (size);
  43     else
  44         p = realloc (ptr, size);
  45     if (!p) {
  46         MessageBox(NULL, "Out of memory!", "PuTTY Fatal Error",
  47                    MB_SYSTEMMODAL | MB_ICONERROR | MB_OK);
  48         exit(1);
  49     }
  50 #ifdef MALLOC_LOG
  51     if (fp)
  52         fprintf(fp, "realloc(%p,%d) returns %p\n", ptr, size, p);
  53 #endif
  54     return p;
  55 }
  56
  57 void safefree(void *ptr) {
  58     if (ptr) {
  59 #ifdef MALLOC_LOG
  60         if (fp)
  61             fprintf(fp, "free(%p)\n", ptr);
  62 #endif
  63         free (ptr);
  64     }
  65 #ifdef MALLOC_LOG
  66     else if (fp)
  67         fprintf(fp, "freeing null pointer - no action taken\n");
  68 #endif
  69 }