#include "../factor.h" BOUNDED_BLOCK *alloc_bounded_block(CELL size) { SYSTEM_INFO si; char *mem; DWORD ignore; GetSystemInfo(&si); if((mem = (char *)VirtualAlloc(NULL, si.dwPageSize*2 + size, MEM_COMMIT, PAGE_EXECUTE_READWRITE)) == 0) fatal_error("VirtualAlloc() failed in alloc_bounded_block()",0); if (!VirtualProtect(mem, si.dwPageSize, PAGE_NOACCESS, &ignore)) fatal_error("Cannot allocate low guard page", (CELL)mem); if (!VirtualProtect(mem+size+si.dwPageSize, si.dwPageSize, PAGE_NOACCESS, &ignore)) fatal_error("Cannot allocate high guard page", (CELL)mem); BOUNDED_BLOCK *block = safe_malloc(sizeof(BOUNDED_BLOCK)); block->start = (int)mem + si.dwPageSize; block->size = size; return block; } void dealloc_bounded_block(BOUNDED_BLOCK *block) { SYSTEM_INFO si; GetSystemInfo(&si); if(!VirtualFree((void*)(block->start - si.dwPageSize), 0, MEM_RELEASE)) fatal_error("VirtualFree() failed",0); free(block); }