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Reimplement Mutex with C++'s <mutex>

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Main:
- It's now implemented thanks to `<mutex>`. No more platform-specific implementations.
- `BinaryMutex` (non-recursive) is added, as an alternative for special cases.
- Doesn't need allocation/deallocation anymore. It can live in the stack and be part of other classes.
- Because of that, it's methods are now `const` and the inner mutex is `mutable` so it can be easily used in `const` contexts.
- A no-op implementation is provided if `NO_THREADS` is defined. No more need to add `#ifdef NO_THREADS` just for this.
- `MutexLock` now takes a reference. At this point the cases of null `Mutex`es are rare. If you ever need that, just don't use `MutexLock`.
- Thread-safe utilities are therefore simpler now.

Misc.:
- `ScopedMutexLock` is dropped and replaced by `MutexLock`, because they were pretty much the same.
- Every case of lock, do-something, unlock is replaced by `MutexLock` (complex cases where it's not straightfoward are kept as as explicit lock and unlock).
- `ShaderRD` contained an `std::mutex`, which has been replaced by `Mutex`.
This commit is contained in:
Pedro J. Estébanez
2020-02-26 11:28:13 +01:00
parent 1e57b558f2
commit 18fbdbb456
98 changed files with 739 additions and 1754 deletions
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19
editor/editor_node.cpp
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@@ -5554,7 +5554,7 @@ void EditorNode::_print_handler(void *p_this, const String &p_string, bool p_err
static void _execute_thread(void *p_ud) {
EditorNode::ExecuteThreadArgs *eta = (EditorNode::ExecuteThreadArgs *)p_ud;
Error err = OS::get_singleton()->execute(eta->path, eta->args, true, NULL, &eta->output, &eta->exitcode, true, eta->execute_output_mutex);
Error err = OS::get_singleton()->execute(eta->path, eta->args, true, NULL, &eta->output, &eta->exitcode, true, &eta->execute_output_mutex);
print_verbose("Thread exit status: " + itos(eta->exitcode));
if (err != OK) {
eta->exitcode = err;
@@ -5574,7 +5574,6 @@ int EditorNode::execute_and_show_output(const String &p_title, const String &p_p
ExecuteThreadArgs eta;
eta.path = p_path;
eta.args = p_arguments;
eta.execute_output_mutex = Mutex::create();
eta.exitcode = 255;
eta.done = false;
@@ -5585,20 +5584,20 @@ int EditorNode::execute_and_show_output(const String &p_title, const String &p_p
ERR_FAIL_COND_V(!eta.execute_output_thread, 0);
while (!eta.done) {
eta.execute_output_mutex->lock();
if (prev_len != eta.output.length()) {
String to_add = eta.output.substr(prev_len, eta.output.length());
prev_len = eta.output.length();
execute_outputs->add_text(to_add);
Main::iteration();
{
MutexLock lock(eta.execute_output_mutex);
if (prev_len != eta.output.length()) {
String to_add = eta.output.substr(prev_len, eta.output.length());
prev_len = eta.output.length();
execute_outputs->add_text(to_add);
Main::iteration();
}
}
eta.execute_output_mutex->unlock();
OS::get_singleton()->delay_usec(1000);
}
Thread::wait_to_finish(eta.execute_output_thread);
memdelete(eta.execute_output_thread);
memdelete(eta.execute_output_mutex);
execute_outputs->add_text("\nExit Code: " + itos(eta.exitcode));
if (p_close_on_errors && eta.exitcode != 0) {