diff options
| -rw-r--r-- | win/inspircd_memory_functions.cpp | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/win/inspircd_memory_functions.cpp b/win/inspircd_memory_functions.cpp index d487f69e3..ea4afa04c 100644 --- a/win/inspircd_memory_functions.cpp +++ b/win/inspircd_memory_functions.cpp @@ -1,14 +1,24 @@ -// Use the global heap for this process for all allocate/free operations.
#include "inspircd_win32wrapper.h"
#include <exception>
#include <new>
#include <new.h>
+/** On windows, all dll files and executables have their own private heap,
+ * whereas on POSIX systems, shared objects loaded into an executable share
+ * the executable's heap. This means that if we pass an arbitrary pointer to
+ * a windows DLL which is not allocated in that dll, without some form of
+ * marshalling, we get a page fault. To fix this, these overrided operators
+ * new and delete use the windows HeapAlloc and HeapFree functions to claim
+ * memory from the windows global heap. This makes windows 'act like' POSIX
+ * when it comes to memory usage between dlls and exes.
+ */
+
void * ::operator new(size_t iSize)
{
- void* ptr = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, iSize); // zero memory for unix compatibility
+ void* ptr = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, iSize); /* zero memory for unix compatibility */
/* This is the correct behaviour according to C++ standards for out of memory,
- * not returning null -- Brain*/
+ * not returning null -- Brain
+ */
if (!ptr)
throw std::bad_alloc();
else
|