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/*
* Copyright (c) 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution 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 of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
* Sun gratefully acknowledges that this software was originally authored
* and developed by Kenneth Bradley Russell and Christopher John Kline.
*/
package com.jogamp.gluegen.procaddress;
import com.jogamp.gluegen.CMethodBindingEmitter;
import com.jogamp.gluegen.MethodBinding;
import com.jogamp.gluegen.JavaType;
import java.io.*;
import com.jogamp.gluegen.cgram.types.*;
public class ProcAddressCMethodBindingEmitter extends CMethodBindingEmitter {
private boolean callThroughProcAddress;
private boolean needsLocalTypedef;
private String localTypedefCallingConvention;
private static final String procAddressJavaTypeName = JavaType.createForClass(Long.TYPE).jniTypeName();
private ProcAddressEmitter emitter;
public ProcAddressCMethodBindingEmitter(final CMethodBindingEmitter methodToWrap,
final boolean callThroughProcAddress,
final boolean needsLocalTypedef,
final String localTypedefCallingConvention,
final ProcAddressEmitter emitter) {
super(
new MethodBinding(methodToWrap.getBinding()) {
@Override
public String getName() {
if (callThroughProcAddress) {
return ProcAddressEmitter.WRAP_PREFIX + super.getName();
} else {
return super.getName();
}
}
},
methodToWrap.getDefaultOutput(),
methodToWrap.getJavaPackageName(),
methodToWrap.getJavaClassName(),
methodToWrap.getIsOverloadedBinding(),
methodToWrap.getIsJavaMethodStatic(),
true,
methodToWrap.forIndirectBufferAndArrayImplementation(),
methodToWrap.getMachineDataInfo(),
emitter.getConfiguration()
);
if (methodToWrap.getReturnValueCapacityExpression() != null) {
setReturnValueCapacityExpression(methodToWrap.getReturnValueCapacityExpression());
}
if (methodToWrap.getReturnValueLengthExpression() != null) {
setReturnValueLengthExpression(methodToWrap.getReturnValueLengthExpression());
}
setTemporaryCVariableDeclarations(methodToWrap.getTemporaryCVariableDeclarations());
setTemporaryCVariableAssignments(methodToWrap.getTemporaryCVariableAssignments());
setCommentEmitter(defaultCommentEmitter);
this.callThroughProcAddress = callThroughProcAddress;
this.needsLocalTypedef = needsLocalTypedef;
this.localTypedefCallingConvention = localTypedefCallingConvention;
this.emitter = emitter;
}
@Override
protected int emitArguments(final PrintWriter writer) {
int numEmitted = super.emitArguments(writer);
if (callThroughProcAddress) {
if (numEmitted > 0) {
writer.print(", ");
}
writer.print(procAddressJavaTypeName);
writer.print(" procAddress");
++numEmitted;
}
return numEmitted;
}
@Override
protected void emitBodyVariableDeclarations(final PrintWriter writer) {
if (callThroughProcAddress) {
// create variable for the function pointer with the right type, and set
// it to the value of the passed-in proc address
final FunctionSymbol cSym = getBinding().getCSymbol();
String funcPointerTypedefName =
emitter.getFunctionPointerTypedefName(cSym);
if (needsLocalTypedef) {
// We (probably) didn't get a typedef for this function
// pointer type in the header file; the user requested that we
// forcibly generate one. Here we force the emission of one.
final PointerType funcPtrType = new PointerType(null, cSym.getType(), 0, null);
// Just for safety, emit this name slightly differently than
// the mangling would otherwise produce
funcPointerTypedefName = "_local_" + funcPointerTypedefName;
writer.print(" typedef ");
writer.print(funcPtrType.toString(funcPointerTypedefName, localTypedefCallingConvention));
writer.println(";");
}
writer.print(" ");
writer.print(funcPointerTypedefName);
writer.print(" ptr_");
writer.print(cSym.getName());
writer.println(";");
}
super.emitBodyVariableDeclarations(writer);
}
@Override
protected void emitBodyVariablePreCallSetup(final PrintWriter writer) {
super.emitBodyVariablePreCallSetup(writer);
if (callThroughProcAddress) {
// set the function pointer to the value of the passed-in procAddress
final FunctionSymbol cSym = getBinding().getCSymbol();
String funcPointerTypedefName = emitter.getFunctionPointerTypedefName(cSym);
if (needsLocalTypedef) {
funcPointerTypedefName = "_local_" + funcPointerTypedefName;
}
final String ptrVarName = "ptr_" + cSym.getName();
writer.print(" ");
writer.print(ptrVarName);
writer.print(" = (");
writer.print(funcPointerTypedefName);
writer.println(") (intptr_t) procAddress;");
writer.println(" assert(" + ptrVarName + " != NULL);");
}
}
@Override
protected void emitBodyCallCFunction(final PrintWriter writer) {
if (!callThroughProcAddress) {
super.emitBodyCallCFunction(writer);
} else {
// Make the call to the actual C function
writer.print(" ");
// WARNING: this code assumes that the return type has already been
// typedef-resolved.
final Type cReturnType = binding.getCReturnType();
if (!cReturnType.isVoid()) {
writer.print("_res = ");
}
final MethodBinding mBinding = getBinding();
if (mBinding.hasContainingType()) {
// FIXME: this can and should be handled and unified with the
// associated code in the CMethodBindingEmitter
throw new IllegalStateException("Cannot call through function pointer because binding has containing type: " + mBinding);
}
// call throught the run-time function pointer
writer.print("(* ptr_");
writer.print(mBinding.getCSymbol().getName());
writer.print(") ");
writer.print("(");
emitBodyPassCArguments(writer);
writer.println(");");
}
}
@Override
protected String jniMangle(final MethodBinding binding) {
final StringBuilder buf = new StringBuilder(super.jniMangle(binding));
if (callThroughProcAddress) {
jniMangle(Long.TYPE, buf, false); // to account for the additional _addr_ parameter
}
return buf.toString();
}
}
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