125 lines
4.5 KiB
Plaintext
125 lines
4.5 KiB
Plaintext
// Filename: memoryHook.I
|
|
// Created by: drose (28Jun07)
|
|
//
|
|
////////////////////////////////////////////////////////////////////
|
|
//
|
|
// PANDA 3D SOFTWARE
|
|
// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
|
|
//
|
|
// All use of this software is subject to the terms of the Panda 3d
|
|
// Software license. You should have received a copy of this license
|
|
// along with this source code; you will also find a current copy of
|
|
// the license at http://etc.cmu.edu/panda3d/docs/license/ .
|
|
//
|
|
// To contact the maintainers of this program write to
|
|
// panda3d-general@lists.sourceforge.net .
|
|
//
|
|
////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: MemoryHook::inc_heap
|
|
// Access: Public
|
|
// Description: Called by our alternative malloc implementations
|
|
// (dlmalloc and ptmalloc2) to indicate they have
|
|
// requested size bytes from the system for the heap.
|
|
////////////////////////////////////////////////////////////////////
|
|
INLINE void MemoryHook::
|
|
inc_heap(size_t size) {
|
|
#ifdef DO_MEMORY_USAGE
|
|
AtomicAdjust::add(_requested_heap_size, (AtomicAdjust::Integer)size);
|
|
#endif // DO_MEMORY_USAGE
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: MemoryHook::dec_heap
|
|
// Access: Public
|
|
// Description: Called by our alternative malloc implementations
|
|
// (dlmalloc and ptmalloc2) to indicate they have
|
|
// returned size bytes to the system from the heap.
|
|
////////////////////////////////////////////////////////////////////
|
|
INLINE void MemoryHook::
|
|
dec_heap(size_t size) {
|
|
#ifdef DO_MEMORY_USAGE
|
|
assert((int)size <= _requested_heap_size);
|
|
AtomicAdjust::add(_requested_heap_size, -(AtomicAdjust::Integer)size);
|
|
#endif // DO_MEMORY_USAGE
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: MemoryHook::get_page_size
|
|
// Access: Public
|
|
// Description: Returns the operating system page size. This is the
|
|
// minimum granularity required for calls to
|
|
// mmap_alloc(). Also see round_up_to_page_size().
|
|
////////////////////////////////////////////////////////////////////
|
|
INLINE size_t MemoryHook::
|
|
get_page_size() const {
|
|
return _page_size;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: MemoryHook::round_up_to_page_size
|
|
// Access: Public
|
|
// Description: Rounds the indicated size request up to the next
|
|
// larger multiple of page_size, to qualify it for a
|
|
// call to mmap_alloc().
|
|
////////////////////////////////////////////////////////////////////
|
|
INLINE size_t MemoryHook::
|
|
round_up_to_page_size(size_t size) const {
|
|
return ((size + _page_size - 1) / _page_size) * _page_size;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: MemoryHook::inflate_size
|
|
// Access: Private, Static
|
|
// Description: Increments the amount of requested size as necessary
|
|
// to accomodate the extra data we might piggyback on
|
|
// each allocated block.
|
|
////////////////////////////////////////////////////////////////////
|
|
INLINE size_t MemoryHook::
|
|
inflate_size(size_t size) {
|
|
#ifdef DO_MEMORY_USAGE
|
|
return size + sizeof(size_t);
|
|
#else
|
|
return size;
|
|
#endif // DO_MEMORY_USAGE
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: MemoryHook::alloc_to_ptr
|
|
// Access: Private, Static
|
|
// Description: Converts an allocated pointer to a pointer returnable
|
|
// to the application. Stuffs size in the first n bytes
|
|
// of the allocated space.
|
|
////////////////////////////////////////////////////////////////////
|
|
INLINE void *MemoryHook::
|
|
alloc_to_ptr(void *alloc, size_t size) {
|
|
#ifdef DO_MEMORY_USAGE
|
|
size_t *root = (size_t *)alloc;
|
|
root[0] = size;
|
|
return (void *)(root + 1);
|
|
#else
|
|
return alloc;
|
|
#endif // DO_MEMORY_USAGE
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: MemoryHook::ptr_to_alloc
|
|
// Access: Private, Static
|
|
// Description: Converts an application pointer back to the original
|
|
// allocated pointer. Extracts size from the first n
|
|
// bytes of the allocated space.
|
|
////////////////////////////////////////////////////////////////////
|
|
INLINE void *MemoryHook::
|
|
ptr_to_alloc(void *ptr, size_t &size) {
|
|
#ifdef DO_MEMORY_USAGE
|
|
size_t *root = (size_t *)ptr;
|
|
root -= 1;
|
|
size = root[0];
|
|
return (void *)root;
|
|
#else
|
|
return ptr;
|
|
#endif // DO_MEMORY_USAGE
|
|
}
|