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Reduce unnecessary COW on Vector by make writing explicit

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This commit makes operator[] on Vector const and adds a write proxy to it.  From
now on writes to Vectors need to happen through the .write proxy. So for
instance:

Vector<int> vec;
vec.push_back(10);
std::cout << vec[0] << std::endl;
vec.write[0] = 20;

Failing to use the .write proxy will cause a compilation error.

In addition COWable datatypes can now embed a CowData pointer to their data.
This means that String, CharString, and VMap no longer use or derive from
Vector.

_ALWAYS_INLINE_ and _FORCE_INLINE_ are now equivalent for debug and non-debug
builds. This is a lot faster for Vector in the editor and while running tests.
The reason why this difference used to exist is because force-inlined methods
used to give a bad debugging experience. After extensive testing with modern
compilers this is no longer the case.
This commit is contained in:
Hein-Pieter van Braam 2018-07-25 03:11:03 +02:00
parent 9423f23ffb
commit 0e29f7974b
228 changed files with 2200 additions and 2082 deletions
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16
servers/visual/shader_language.cpp
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@ -2471,7 +2471,7 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
//add to current function as dependency
for (int j = 0; j < shader->functions.size(); j++) {
if (shader->functions[j].name == current_function) {
shader->functions[j].uses_function.insert(name);
shader->functions.write[j].uses_function.insert(name);
break;
}
}
@ -3021,8 +3021,8 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
}
op->arguments.push_back(expression[i + 1].node);
expression[i].is_op = false;
expression[i].node = op;
expression.write[i].is_op = false;
expression.write[i].node = op;
if (!_validate_operator(op, &op->return_cache)) {
@ -3056,8 +3056,8 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
op->arguments.push_back(expression[next_op + 1].node);
op->arguments.push_back(expression[next_op + 3].node);
expression[next_op - 1].is_op = false;
expression[next_op - 1].node = op;
expression.write[next_op - 1].is_op = false;
expression.write[next_op - 1].node = op;
if (!_validate_operator(op, &op->return_cache)) {
String at;
@ -3107,7 +3107,7 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
op->arguments.push_back(expression[next_op - 1].node); //expression goes as left
op->arguments.push_back(expression[next_op + 1].node); //next expression goes as right
expression[next_op - 1].node = op;
expression.write[next_op - 1].node = op;
//replace all 3 nodes by this operator and make it an expression
@ -3149,7 +3149,7 @@ ShaderLanguage::Node *ShaderLanguage::_reduce_expression(BlockNode *p_block, Sha
for (int i = 1; i < op->arguments.size(); i++) {
op->arguments[i] = _reduce_expression(p_block, op->arguments[i]);
op->arguments.write[i] = _reduce_expression(p_block, op->arguments[i]);
if (op->arguments[i]->type == Node::TYPE_CONSTANT) {
ConstantNode *cn = static_cast<ConstantNode *>(op->arguments[i]);
@ -3189,7 +3189,7 @@ ShaderLanguage::Node *ShaderLanguage::_reduce_expression(BlockNode *p_block, Sha
return cn;
} else if (op->op == OP_NEGATE) {
op->arguments[0] = _reduce_expression(p_block, op->arguments[0]);
op->arguments.write[0] = _reduce_expression(p_block, op->arguments[0]);
if (op->arguments[0]->type == Node::TYPE_CONSTANT) {
ConstantNode *cn = static_cast<ConstantNode *>(op->arguments[0]);