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Try to mimic std::thread API

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No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2012-03-25 12:01:56 +01:00
parent 41561c9bb8
commit c483ffc773
3 changed files with 23 additions and 29 deletions
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40
src/thread.cpp
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@@ -32,37 +32,24 @@ ThreadsManager Threads; // Global object
namespace { extern "C" {
// start_routine() is the C function which is called when a new thread
// is launched. It simply calls idle_loop() of the supplied thread. The first
// and last thread are special. First one is the main search thread while the
// last one mimics a timer, they run in main_loop() and timer_loop().
// is launched. It is a wrapper to member function pointed by start_fn
long start_routine(Thread* th) {
if (th->threadID == 0)
th->main_loop();
else if (th->threadID == MAX_THREADS)
th->timer_loop();
else
th->idle_loop(NULL);
return 0;
}
long start_routine(Thread* th) { (th->*(th->start_fn))(); return 0; }
} }
// Thread c'tor creates and launches the OS thread, that will go immediately to
// sleep.
// Thread c'tor starts a newly-created thread of execution that will call
// the idle loop function pointed by start_fn going immediately to sleep.
Thread::Thread(int id) {
Thread::Thread(Fn fn) {
is_searching = do_exit = false;
maxPly = splitPointsCnt = 0;
curSplitPoint = NULL;
threadID = id;
do_sleep = (id != 0); // Avoid a race with start_thinking()
start_fn = fn;
threadID = Threads.size();
do_sleep = (threadID != 0); // Avoid a race with start_thinking()
lock_init(sleepLock);
cond_init(sleepCond);
@@ -72,7 +59,7 @@ Thread::Thread(int id) {
if (!thread_create(handle, start_routine, this))
{
std::cerr << "Failed to create thread number " << id << std::endl;
std::cerr << "Failed to create thread number " << threadID << std::endl;
::exit(EXIT_FAILURE);
}
}
@@ -221,8 +208,10 @@ void ThreadsManager::read_uci_options() {
useSleepingThreads = Options["Use Sleeping Threads"];
int requested = Options["Threads"];
assert(requested > 0);
while (size() < requested)
threads.push_back(new Thread(size()));
threads.push_back(new Thread(&Thread::idle_loop));
while (size() > requested)
{
@@ -264,8 +253,9 @@ void ThreadsManager::init() {
cond_init(sleepCond);
lock_init(splitLock);
timer = new Thread(MAX_THREADS);
read_uci_options(); // Creates at least the main thread
timer = new Thread(&Thread::timer_loop);
threads.push_back(new Thread(&Thread::main_loop));
read_uci_options();
}