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// AsmJit - Complete JIT Assembler for C++ Language.
// Copyright (c) 2008-2010, Petr Kobalicek <kobalicek.petr@gmail.com>
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
// [Dependencies]
#include "Assembler.h"
#include "CodeGenerator.h"
#include "Defs.h"
#include "MemoryManager.h"
namespace AsmJit {
// ============================================================================
// [AsmJit::CodeGenerator]
// ============================================================================
CodeGenerator::CodeGenerator()
{
}
CodeGenerator::~CodeGenerator()
{
}
CodeGenerator* CodeGenerator::getGlobal()
{
static JitCodeGenerator global;
return &global;
}
// ============================================================================
// [AsmJit::JitCodeGenerator]
// ============================================================================
JitCodeGenerator::JitCodeGenerator() :
_memoryManager(NULL),
_allocType(MEMORY_ALLOC_FREEABLE)
{
}
JitCodeGenerator::~JitCodeGenerator()
{
}
uint32_t JitCodeGenerator::generate(void** dest, Assembler* assembler)
{
// Disallow empty code generation.
sysuint_t codeSize = assembler->getCodeSize();
if (codeSize == 0)
{
*dest = NULL;
return AsmJit::ERROR_NO_FUNCTION;
}
// Switch to global memory manager if not provided.
MemoryManager* memmgr = getMemoryManager();
if (memmgr == NULL) memmgr = MemoryManager::getGlobal();
void* p = memmgr->alloc(codeSize, getAllocType());
if (p == NULL)
{
*dest = NULL;
return ERROR_NO_VIRTUAL_MEMORY;
}
// Relocate the code.
sysuint_t relocatedSize = assembler->relocCode(p);
// Return unused memory to mamory-manager.
if (relocatedSize < codeSize)
{
memmgr->shrink(p, relocatedSize);
}
// Return the code.
*dest = p;
return ERROR_NONE;
}
} // AsmJit namespace
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