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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "dummy_bucket_executor.h"
#include <vespa/vespalib/util/threadstackexecutor.h>
#include <vespa/vespalib/util/lambdatask.h>
#include <vespa/vespalib/util/destructor_callbacks.h>
using vespalib::makeLambdaTask;
using vespalib::makeSharedLambdaCallback;
namespace storage::spi::dummy {
DummyBucketExecutor::DummyBucketExecutor(size_t numExecutors)
: _executor(std::make_unique<vespalib::ThreadStackExecutor>(numExecutors)),
_lock(),
_cond(),
_inFlight(),
_defer_tasks(false),
_deferred_tasks()
{
}
DummyBucketExecutor::~DummyBucketExecutor() {
sync();
}
void
DummyBucketExecutor::execute(const Bucket & bucket, std::unique_ptr<BucketTask> task) {
if (!_defer_tasks) {
internal_execute_no_defer(bucket, std::move(task));
} else {
_deferred_tasks.emplace_back(bucket, std::move(task));
}
}
void
DummyBucketExecutor::internal_execute_no_defer(const Bucket& bucket, std::unique_ptr<BucketTask> task) {
auto failed = _executor->execute(makeLambdaTask([this, bucket, bucketTask=std::move(task)]() {
{
std::unique_lock guard(_lock);
while (_inFlight.contains(bucket.getBucket())) {
_cond.wait(guard);
}
_inFlight.insert(bucket.getBucket());
}
bucketTask->run(bucket, makeSharedLambdaCallback([this, bucket]() {
std::unique_lock guard(_lock);
assert(_inFlight.contains(bucket.getBucket()));
_inFlight.erase(bucket.getBucket());
_cond.notify_all();
}));
}));
if (failed) {
failed->run();
}
}
void
DummyBucketExecutor::defer_new_tasks() {
std::lock_guard guard(_lock);
_defer_tasks = true;
}
void
DummyBucketExecutor::schedule_all_deferred_tasks() {
DeferredTasks to_run;
{
std::lock_guard guard(_lock);
assert(_defer_tasks);
_deferred_tasks.swap(to_run);
}
for (auto& bucket_and_task : to_run) {
internal_execute_no_defer(bucket_and_task.first, std::move(bucket_and_task.second));
}
}
size_t
DummyBucketExecutor::num_deferred_tasks() const noexcept {
std::lock_guard guard(_lock);
return _deferred_tasks.size();
}
void
DummyBucketExecutor::schedule_single_deferred_task() {
std::pair<Bucket, std::unique_ptr<BucketTask>> bucket_and_task;
{
std::lock_guard guard(_lock);
assert(_defer_tasks);
assert(!_deferred_tasks.empty());
bucket_and_task = std::move(_deferred_tasks.front());
_deferred_tasks.pop_front();
}
internal_execute_no_defer(bucket_and_task.first, std::move(bucket_and_task.second));
}
void
DummyBucketExecutor::sync() {
_executor->sync();
}
}
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