mirror of
https://github.com/kevinbentley/Descent3.git
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164 lines
3.9 KiB
C++
164 lines
3.9 KiB
C++
/*
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AngelCode Scripting Library
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Copyright (c) 2003-2009 Andreas Jonsson
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any
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damages arising from the use of this software.
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Permission is granted to anyone to use this software for any
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purpose, including commercial applications, and to alter it and
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redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you
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must not claim that you wrote the original software. If you use
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this software in a product, an acknowledgment in the product
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documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and
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must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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The original version of this library can be located at:
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http://www.angelcode.com/angelscript/
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Andreas Jonsson
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andreas@angelcode.com
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*/
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//
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// as_memory.cpp
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//
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// Overload the default memory management functions so that we
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// can let the application decide how to do it.
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//
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#include <stdlib.h>
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#include "as_config.h"
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#include "as_memory.h"
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#include "as_scriptnode.h"
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#include "as_bytecode.h"
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BEGIN_AS_NAMESPACE
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// By default we'll use the standard memory management functions
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asALLOCFUNC_t userAlloc = malloc;
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asFREEFUNC_t userFree = free;
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extern "C"
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{
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int asSetGlobalMemoryFunctions(asALLOCFUNC_t allocFunc, asFREEFUNC_t freeFunc)
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{
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userAlloc = allocFunc;
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userFree = freeFunc;
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return 0;
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}
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int asResetGlobalMemoryFunctions()
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{
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asThreadCleanup();
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userAlloc = malloc;
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userFree = free;
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return 0;
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}
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} // extern "C"
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asCMemoryMgr::asCMemoryMgr()
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{
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}
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asCMemoryMgr::~asCMemoryMgr()
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{
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FreeUnusedMemory();
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}
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void asCMemoryMgr::FreeUnusedMemory()
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{
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// It's necessary to protect the scriptNodePool from multiple
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// simultaneous accesses, as the parser is used by several methods
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// that can be executed simultaneously.
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ENTERCRITICALSECTION(cs);
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int n;
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for( n = 0; n < (signed)scriptNodePool.GetLength(); n++ )
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userFree(scriptNodePool[n]);
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scriptNodePool.Allocate(0, false);
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LEAVECRITICALSECTION(cs);
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// The engine already protects against multiple threads
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// compiling scripts simultaneously so this pool doesn't have
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// to be protected again.
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for( n = 0; n < (signed)byteInstructionPool.GetLength(); n++ )
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userFree(byteInstructionPool[n]);
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byteInstructionPool.Allocate(0, false);
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}
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void *asCMemoryMgr::AllocScriptNode()
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{
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ENTERCRITICALSECTION(cs);
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if( scriptNodePool.GetLength() )
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{
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void *tRet = scriptNodePool.PopLast();
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LEAVECRITICALSECTION(cs);
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return tRet;
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}
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LEAVECRITICALSECTION(cs);
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#if defined(AS_DEBUG)
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return ((asALLOCFUNCDEBUG_t)(userAlloc))(sizeof(asCScriptNode), __FILE__, __LINE__);
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#else
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return userAlloc(sizeof(asCScriptNode));
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#endif
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}
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void asCMemoryMgr::FreeScriptNode(void *ptr)
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{
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ENTERCRITICALSECTION(cs);
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// Pre allocate memory for the array to avoid slow growth
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if( scriptNodePool.GetLength() == 0 )
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scriptNodePool.Allocate(100, 0);
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scriptNodePool.PushLast(ptr);
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LEAVECRITICALSECTION(cs);
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}
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void *asCMemoryMgr::AllocByteInstruction()
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{
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if( byteInstructionPool.GetLength() )
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return byteInstructionPool.PopLast();
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#if defined(AS_DEBUG)
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return ((asALLOCFUNCDEBUG_t)(userAlloc))(sizeof(cByteInstruction), __FILE__, __LINE__);
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#else
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return userAlloc(sizeof(cByteInstruction));
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#endif
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}
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void asCMemoryMgr::FreeByteInstruction(void *ptr)
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{
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// Pre allocate memory for the array to avoid slow growth
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if( byteInstructionPool.GetLength() == 0 )
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byteInstructionPool.Allocate(100, 0);
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byteInstructionPool.PushLast(ptr);
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}
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END_AS_NAMESPACE
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