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/*
AngelCode Scripting Library
Copyright (c) 2003-2021 Andreas Jonsson
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any
damages arising from the use of this software.
Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it and
redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you
must not claim that you wrote the original software. If you use
this software in a product, an acknowledgment in the product
documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and
must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
The original version of this library can be located at:
http://www.angelcode.com/angelscript/
Andreas Jonsson
andreas@angelcode.com
*/
//
// as_callfunc.h
//
// These functions handle the actual calling of system functions
//
#ifndef AS_CALLFUNC_H
#define AS_CALLFUNC_H
#include "as_memory.h"
BEGIN_AS_NAMESPACE
class asCContext;
class asCScriptEngine;
class asCScriptFunction;
class asCObjectType;
struct asSSystemFunctionInterface;
int DetectCallingConvention(bool isMethod, const asSFuncPtr &ptr, int callConv, void *auxiliary, asSSystemFunctionInterface *internal);
int PrepareSystemFunctionGeneric(asCScriptFunction *func, asSSystemFunctionInterface *internal, asCScriptEngine *engine);
int PrepareSystemFunction(asCScriptFunction *func, asSSystemFunctionInterface *internal, asCScriptEngine *engine);
int CallSystemFunction(int id, asCContext *context);
inline asPWORD FuncPtrToUInt(asFUNCTION_t func) {
// A little trickery as the C++ standard doesn't allow direct
// conversion between function pointer and data pointer
union {
asFUNCTION_t func;
asPWORD idx;
} u;
u.func = func;
return u.idx;
}
enum internalCallConv {
ICC_GENERIC_FUNC,
ICC_GENERIC_FUNC_RETURNINMEM, // never used
ICC_CDECL,
ICC_CDECL_RETURNINMEM,
ICC_STDCALL,
ICC_STDCALL_RETURNINMEM,
ICC_THISCALL,
ICC_THISCALL_RETURNINMEM,
ICC_VIRTUAL_THISCALL,
ICC_VIRTUAL_THISCALL_RETURNINMEM,
ICC_CDECL_OBJLAST,
ICC_CDECL_OBJLAST_RETURNINMEM,
ICC_CDECL_OBJFIRST,
ICC_CDECL_OBJFIRST_RETURNINMEM,
ICC_GENERIC_METHOD,
ICC_GENERIC_METHOD_RETURNINMEM, // never used
ICC_THISCALL_OBJLAST,
ICC_THISCALL_OBJLAST_RETURNINMEM,
ICC_VIRTUAL_THISCALL_OBJLAST,
ICC_VIRTUAL_THISCALL_OBJLAST_RETURNINMEM,
ICC_THISCALL_OBJFIRST,
ICC_THISCALL_OBJFIRST_RETURNINMEM,
ICC_VIRTUAL_THISCALL_OBJFIRST,
ICC_VIRTUAL_THISCALL_OBJFIRST_RETURNINMEM
};
struct asSSystemFunctionInterface {
asFUNCTION_t func;
int baseOffset;
internalCallConv callConv;
bool hostReturnInMemory;
bool hostReturnFloat;
int hostReturnSize;
int paramSize;
bool takesObjByVal;
asCArray<bool> paramAutoHandles; // TODO: Should be able to remove this array. Perhaps the flags can be stored together with the inOutFlags in asCScriptFunction?
bool returnAutoHandle;
int compositeOffset;
bool isCompositeIndirect;
void *auxiliary; // can be used for functors, e.g. by asCALL_THISCALL_ASGLOBAL or asCALL_THISCALL_OBJFIRST
struct SClean {
asCObjectType *ot; // argument type for clean up
short op; // clean up operation: 0 = release, 1 = free, 2 = destruct then free
short off; // argument offset on the stack
};
asCArray<SClean> cleanArgs;
asSSystemFunctionInterface() {
Clear();
}
asSSystemFunctionInterface(const asSSystemFunctionInterface &in) {
*this = in;
}
void Clear() {
func = 0;
baseOffset = 0;
callConv = ICC_GENERIC_FUNC;
hostReturnInMemory = false;
hostReturnFloat = false;
hostReturnSize = 0;
paramSize = 0;
takesObjByVal = false;
returnAutoHandle = false;
compositeOffset = 0;
isCompositeIndirect = false;
auxiliary = 0;
paramAutoHandles.SetLength(0);
cleanArgs.SetLength(0);
}
asSSystemFunctionInterface &operator=(const asSSystemFunctionInterface &in) {
func = in.func;
baseOffset = in.baseOffset;
callConv = in.callConv;
hostReturnInMemory = in.hostReturnInMemory;
hostReturnFloat = in.hostReturnFloat;
hostReturnSize = in.hostReturnSize;
paramSize = in.paramSize;
takesObjByVal = in.takesObjByVal;
returnAutoHandle = in.returnAutoHandle;
compositeOffset = in.compositeOffset;
isCompositeIndirect = in.isCompositeIndirect;
auxiliary = in.auxiliary;
cleanArgs = in.cleanArgs;
paramAutoHandles = in.paramAutoHandles;
return *this;
}
};
END_AS_NAMESPACE
#endif
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