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Detach search arguments from UI thread

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Detach from the UI thread the input arguments used by
the search threads so that the UI thread is able to receive
and process any command sent by the GUI while other threads
keep searching.

With this patch there is no more need to block the UI
thread after a "stop", so it is a more reliable and
robust solution than the previous patch.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2011-11-27 17:07:17 +01:00
parent 6809b57cfc
commit bb3427ca85
8 changed files with 45 additions and 59 deletions
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33
src/thread.cpp
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@@ -423,37 +423,26 @@ void Thread::main_loop() {
}
// ThreadsManager::wait_end_of_search() blocks UI thread until main thread has
// returned to sleep in main_loop(). It is needed becuase xboard sends immediately
// new position to search after a "stop" due to ponder miss.
void ThreadsManager::wait_end_of_search() {
Thread& main = threads[0];
lock_grab(&main.sleepLock);
while (!main.do_sleep)
cond_wait(&sleepCond, &main.sleepLock);
lock_release(&main.sleepLock);
}
// ThreadsManager::start_thinking() is used by UI thread to wake up the main
// thread parked in main_loop() and starting a new search. If asyncMode is true
// then function returns immediately, otherwise caller is blocked waiting for
// the search to finish.
void ThreadsManager::start_thinking(bool asyncMode) {
void ThreadsManager::start_thinking(const Position& pos, const Search::LimitsType& limits,
const std::vector<Move>& searchMoves, bool asyncMode) {
Thread& main = threads[0];
// Wait main thread has finished before to launch a new search
wait_end_of_search();
lock_grab(&main.sleepLock);
// Wait main thread has finished before to launch a new search
while (!main.do_sleep)
cond_wait(&sleepCond, &main.sleepLock);
// Copy input arguments to Search global variables
Search::RootPosition.copy(pos, 0);
Search::Limits = limits;
Search::RootMoves = searchMoves;
// Reset signals before to start the search
memset((void*)&Search::Signals, 0, sizeof(Search::Signals));