File indexing completed on 2024-12-22 04:18:20

 #include <stdio.h>
 #include <stdlib.h>
 
 static int MB = 1024*1024;
 
 static int sum = 0;
 
 void* tryAllocate(size_t size)
 {
   sum += size/MB;
   void* ptr = malloc(size);
   if (!ptr) {
     printf("FAILED allocating %i MB.\n", size/MB);
     return 0;
   }
   
   printf("allocated %i MB.\n", size/MB);
   return ptr;
 }
 
 int main(int argc, char *argv[])
 {
   size_t size = 100;
   if (argc == 2) {
     size = atoi(argv[1]);
   }
   
   void* ptr1 = tryAllocate(size * MB);
   void* ptr2 = tryAllocate(1500 * MB);
   size_t re = 10 * size;
   void* ptr3 = realloc(ptr1, re  * MB);
   sum += re - size;
   
   int ret = 0;
   if (!ptr3) {
     printf("FAILED reallocating %i MB.\n", re);
     ret = 1;
   } else {
     printf("reallocated %i MB.\n", re);
   }
   
   if (ret == 0)
     printf("allocated %i MB in sum\n", sum);
    else
     printf("FAILED to allocate %i MB in sum\n", sum);
    
   return 0;
 }