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author Aaron Giles <aaron@aarongiles.com>2010-01-08 06:11:00 +0000
committer Aaron Giles <aaron@aarongiles.com>2010-01-08 06:11:00 +0000
commitab68710ce58d99c5275cdbbaefd212a346e819a5 (patch)
treeaba282b9168009b449480b902fd649163faeb07c /src/emu/emualloc.h
parent91a1b8d634131714ec89a07496606880ea487ece (diff)
Oops, forgot these files.
Diffstat (limited to 'src/emu/emualloc.h')
-rw-r--r--src/emu/emualloc.h222
1 files changed, 222 insertions, 0 deletions
diff --git a/src/emu/emualloc.h b/src/emu/emualloc.h
new file mode 100644
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@@ -0,0 +1,222 @@
+/***************************************************************************
+
+ emualloc.h
+
+ Memory allocation helpers for the core emulator.
+
+****************************************************************************
+
+ Copyright Aaron Giles
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in
+ the documentation and/or other materials provided with the
+ distribution.
+ * Neither the name 'MAME' nor the names of its contributors may be
+ used to endorse or promote products derived from this software
+ without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR
+ IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT,
+ INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ POSSIBILITY OF SUCH DAMAGE.
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __EMUALLOC_H__
+#define __EMUALLOC_H__
+
+#include <new>
+#include "osdcore.h"
+
+
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+// zeromem_t is a dummy class used to tell new to zero memory after allocation
+class zeromem_t { };
+
+
+// resource_pool_item is a base class for items that are tracked by a resource pool
+class resource_pool_item
+{
+private:
+ resource_pool_item(const resource_pool_item &);
+ resource_pool_item &operator=(const resource_pool_item &);
+
+public:
+ resource_pool_item(void *_ptr, size_t _size)
+ : next(NULL),
+ ptr(_ptr),
+ size(_size) { }
+ virtual ~resource_pool_item() { }
+
+ resource_pool_item * next;
+ void * ptr;
+ size_t size;
+};
+
+
+// a resource_pool_object is a simple object wrapper for the templatized type
+template<class T> class resource_pool_object : public resource_pool_item
+{
+private:
+ resource_pool_object<T>(const resource_pool_object<T> &);
+ resource_pool_object<T> &operator=(const resource_pool_object<T> &);
+
+public:
+ resource_pool_object(T *_object)
+ : resource_pool_item(reinterpret_cast<void *>(_object), sizeof(T)),
+ object(_object) { }
+ virtual ~resource_pool_object() { delete object; }
+
+private:
+ T *object;
+};
+
+
+// a resource_pool_array is a simple object wrapper for an allocated array of
+// the templatized type
+template<class T> class resource_pool_array : public resource_pool_item
+{
+private:
+ resource_pool_array<T>(const resource_pool_array<T> &);
+ resource_pool_array<T> &operator=(const resource_pool_array<T> &);
+
+public:
+ resource_pool_array(T *_array, int _count)
+ : resource_pool_item(reinterpret_cast<void *>(_array), sizeof(T) * _count),
+ array(_array),
+ count(_count) { }
+ virtual ~resource_pool_array() { delete[] array; }
+
+private:
+ T *array;
+ int count;
+};
+
+
+// a resource pool tracks items and frees them upon reset or destruction
+class resource_pool
+{
+private:
+ resource_pool(const resource_pool &);
+ resource_pool &operator=(const resource_pool &);
+
+public:
+ resource_pool();
+ ~resource_pool();
+
+ void add(resource_pool_item &item);
+ void remove(resource_pool_item &item) { remove(item.ptr); }
+ void remove(void *ptr);
+ void remove(const void *ptr) { remove(const_cast<void *>(ptr)); }
+ resource_pool_item *find(void *ptr);
+ bool contains(void *ptrstart, void *ptrend);
+ void clear();
+
+ template<class T> T *add_object(T* object) { add(*new(__FILE__, __LINE__) resource_pool_object<T>(object)); return object; }
+ template<class T> T *add_array(T* array, int count) { add(*new(__FILE__, __LINE__) resource_pool_array<T>(array, count)); return array; }
+
+private:
+ static const int hash_prime = 193;
+
+ resource_pool_item * hash[hash_prime];
+ osd_lock * listlock;
+};
+
+
+
+/***************************************************************************
+ MACROS
+***************************************************************************/
+
+// re-route classic malloc-style allocations
+#undef malloc
+#undef calloc
+#undef realloc
+#undef free
+
+#define malloc(x) __error_use_auto_alloc_or_global_alloc_instead__
+#define calloc(x,y) __error_use_auto_alloc_clear_or_global_alloc_clear_instead__
+#define realloc(x,y) __error_realloc_is_dangerous__
+#define free(x) __error_use_auto_free_or_global_free_instead__
+
+// pool allocation helpers
+#define pool_alloc(_pool, _type) (_pool).add_object(new(__FILE__, __LINE__) _type)
+#define pool_alloc_clear(_pool, _type) (_pool).add_object(new(__FILE__, __LINE__, zeromem) _type)
+#define pool_alloc_array(_pool, _type, _num) (_pool).add_array(new(__FILE__, __LINE__) _type[_num], (_num))
+#define pool_alloc_array_clear(_pool, _type, _num) (_pool).add_array(new(__FILE__, __LINE__, zeromem) _type[_num], (_num))
+#define pool_free(_pool, v) (_pool).remove(v)
+
+// global allocation helpers
+#define global_alloc(_type) pool_alloc(global_resource_pool, _type)
+#define global_alloc_clear(_type) pool_alloc_clear(global_resource_pool, _type)
+#define global_alloc_array(_type, _num) pool_alloc_array(global_resource_pool, _type, _num)
+#define global_alloc_array_clear(_type, _num) pool_alloc_array_clear(global_resource_pool, _type, _num)
+#define global_free(v) pool_free(global_resource_pool, v)
+
+
+
+/***************************************************************************
+ GLOBAL VARIABLES
+***************************************************************************/
+
+// global resource pool
+extern resource_pool global_resource_pool;
+
+// dummy objects to pass to the specialized new variants
+extern const zeromem_t zeromem;
+
+
+
+/***************************************************************************
+ FUNCTION PROTOTYPES
+***************************************************************************/
+
+// allocate memory with file and line number information
+void *malloc_file_line(size_t size, const char *file, int line);
+
+// free memory with file and line number information
+void free_file_line(void *memory, const char *file, int line);
+
+// called from the exit path of any code that wants to check for unfreed memory
+void dump_unfreed_mem();
+
+// standard new/delete operators (try to avoid using)
+void *operator new(std::size_t size) throw (std::bad_alloc);
+void *operator new[](std::size_t size) throw (std::bad_alloc);
+void operator delete(void *ptr);
+void operator delete[](void *ptr);
+
+// file/line new/delete operators
+void *operator new(std::size_t size, const char *file, int line) throw (std::bad_alloc);
+void *operator new[](std::size_t size, const char *file, int line) throw (std::bad_alloc);
+void operator delete(void *ptr, const char *file, int line);
+void operator delete[](void *ptr, const char *file, int line);
+
+// file/line new/delete operators with zeroing
+void *operator new(std::size_t size, const char *file, int line, const zeromem_t &) throw (std::bad_alloc);
+void *operator new[](std::size_t size, const char *file, int line, const zeromem_t &) throw (std::bad_alloc);
+void operator delete(void *ptr, const char *file, int line, const zeromem_t &);
+void operator delete[](void *ptr, const char *file, int line, const zeromem_t &);
+
+
+#endif /* __EMUALLOC_H__ */