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authorMax Kellermann <max@duempel.org>2014-01-14 10:47:52 +0100
committerMax Kellermann <max@duempel.org>2014-01-14 11:07:06 +0100
commit6cb725391d0388dcb94f6bb7216f0ce3c1fac06a (patch)
tree397b1b2865701a02c557d19b5954f09d973f4f6f
parentc13facdaca7ee3c9ddb9ccc3e7b75654bc268276 (diff)
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db/upnp/WorkQueue: rename attributes
-rw-r--r--src/db/upnp/WorkQueue.hxx156
1 files changed, 78 insertions, 78 deletions
diff --git a/src/db/upnp/WorkQueue.hxx b/src/db/upnp/WorkQueue.hxx
index d1ab7ec43..4bf8c39c2 100644
--- a/src/db/upnp/WorkQueue.hxx
+++ b/src/db/upnp/WorkQueue.hxx
@@ -60,27 +60,27 @@ class WorkQueue {
};
// Configuration
- std::string m_name;
- size_t m_high;
- size_t m_low;
+ const std::string name;
+ const size_t high;
+ const size_t low;
// Status
// Worker threads having called exit
- unsigned int m_workers_exited;
- bool m_ok;
+ unsigned n_workers_exited;
+ bool ok;
// Per-thread data. The data is not used currently, this could be
// a set<pthread_t>
- std::unordered_map<pthread_t, WQTData> m_worker_threads;
+ std::unordered_map<pthread_t, WQTData> threads;
// Synchronization
- std::queue<T> m_queue;
- Cond m_ccond;
- Cond m_wcond;
- Mutex m_mutex;
+ std::queue<T> queue;
+ Cond client_cond;
+ Cond worker_cond;
+ Mutex mutex;
// Client/Worker threads currently waiting for a job
- unsigned int m_clients_waiting;
- unsigned int m_workers_waiting;
+ unsigned n_clients_waiting;
+ unsigned n_workers_waiting;
public:
/** Create a WorkQueue
@@ -89,11 +89,11 @@ public:
* meaning no limit. hi == -1 means that the queue is disabled.
* @param lo minimum count of tasks before worker starts. Default 1.
*/
- WorkQueue(const char *name, size_t hi = 0, size_t lo = 1)
- :m_name(name), m_high(hi), m_low(lo),
- m_workers_exited(0),
- m_ok(true),
- m_clients_waiting(0), m_workers_waiting(0)
+ WorkQueue(const char *_name, size_t hi = 0, size_t lo = 1)
+ :name(_name), high(hi), low(lo),
+ n_workers_exited(0),
+ ok(true),
+ n_clients_waiting(0), n_workers_waiting(0)
{
}
@@ -111,17 +111,17 @@ public:
*/
bool start(int nworkers, void *(*workproc)(void *), void *arg)
{
- const ScopeLock protect(m_mutex);
+ const ScopeLock protect(mutex);
for (int i = 0; i < nworkers; i++) {
int err;
pthread_t thr;
if ((err = pthread_create(&thr, 0, workproc, arg))) {
LOGERR(("WorkQueue:%s: pthread_create failed, err %d\n",
- m_name.c_str(), err));
+ name.c_str(), err));
return false;
}
- m_worker_threads.insert(std::make_pair(thr, WQTData()));
+ threads.insert(std::make_pair(thr, WQTData()));
}
return true;
}
@@ -132,29 +132,29 @@ public:
*/
bool put(T t)
{
- const ScopeLock protect(m_mutex);
+ const ScopeLock protect(mutex);
- if (!ok()) {
+ if (!IsOK()) {
LOGERR(("WorkQueue::put:%s: !ok or mutex_lock failed\n",
- m_name.c_str()));
+ name.c_str()));
return false;
}
- while (ok() && m_high > 0 && m_queue.size() >= m_high) {
- // Keep the order: we test ok() AFTER the sleep...
- m_clients_waiting++;
- m_ccond.wait(m_mutex);
- if (!ok()) {
- m_clients_waiting--;
+ while (IsOK() && high > 0 && queue.size() >= high) {
+ // Keep the order: we test IsOK() AFTER the sleep...
+ n_clients_waiting++;
+ client_cond.wait(mutex);
+ if (!IsOK()) {
+ n_clients_waiting--;
return false;
}
- m_clients_waiting--;
+ n_clients_waiting--;
}
- m_queue.push(t);
- if (m_workers_waiting > 0) {
+ queue.push(t);
+ if (n_workers_waiting > 0) {
// Just wake one worker, there is only one new task.
- m_wcond.signal();
+ worker_cond.signal();
}
return true;
@@ -179,24 +179,24 @@ public:
*/
bool waitIdle()
{
- const ScopeLock protect(m_mutex);
+ const ScopeLock protect(mutex);
- if (!ok()) {
+ if (!IsOK()) {
LOGERR(("WorkQueue::waitIdle:%s: not ok or can't lock\n",
- m_name.c_str()));
+ name.c_str()));
return false;
}
// We're done when the queue is empty AND all workers are back
// waiting for a task.
- while (ok() && (m_queue.size() > 0 ||
- m_workers_waiting != m_worker_threads.size())) {
- m_clients_waiting++;
- m_ccond.wait(m_mutex);
- m_clients_waiting--;
+ while (IsOK() && (queue.size() > 0 ||
+ n_workers_waiting != threads.size())) {
+ n_clients_waiting++;
+ client_cond.wait(mutex);
+ n_clients_waiting--;
}
- return ok();
+ return IsOK();
}
@@ -207,33 +207,33 @@ public:
*/
void setTerminateAndWait()
{
- const ScopeLock protect(m_mutex);
+ const ScopeLock protect(mutex);
- if (m_worker_threads.empty())
+ if (threads.empty())
// Already called ?
return;
// Wait for all worker threads to have called workerExit()
- m_ok = false;
- while (m_workers_exited < m_worker_threads.size()) {
- m_wcond.broadcast();
- m_clients_waiting++;
- m_ccond.wait(m_mutex);
- m_clients_waiting--;
+ ok = false;
+ while (n_workers_exited < threads.size()) {
+ worker_cond.broadcast();
+ n_clients_waiting++;
+ client_cond.wait(mutex);
+ n_clients_waiting--;
}
// Perform the thread joins and compute overall status
// Workers return (void*)1 if ok
- while (!m_worker_threads.empty()) {
+ while (!threads.empty()) {
void *status;
- auto it = m_worker_threads.begin();
+ auto it = threads.begin();
pthread_join(it->first, &status);
- m_worker_threads.erase(it);
+ threads.erase(it);
}
// Reset to start state.
- m_workers_exited = m_clients_waiting = m_workers_waiting = 0;
- m_ok = true;
+ n_workers_exited = n_clients_waiting = n_workers_waiting = 0;
+ ok = true;
}
/** Take task from queue. Called from worker.
@@ -243,34 +243,34 @@ public:
*/
bool take(T &tp)
{
- const ScopeLock protect(m_mutex);
+ const ScopeLock protect(mutex);
- if (!ok()) {
+ if (!IsOK()) {
return false;
}
- while (ok() && m_queue.size() < m_low) {
- m_workers_waiting++;
- if (m_queue.empty())
- m_ccond.broadcast();
- m_wcond.wait(m_mutex);
- if (!ok()) {
+ while (IsOK() && queue.size() < low) {
+ n_workers_waiting++;
+ if (queue.empty())
+ client_cond.broadcast();
+ worker_cond.wait(mutex);
+ if (!IsOK()) {
// !ok is a normal condition when shutting down
- if (ok()) {
+ if (IsOK()) {
LOGERR(("WorkQueue::take:%s: cond_wait failed or !ok\n",
- m_name.c_str()));
+ name.c_str()));
}
- m_workers_waiting--;
+ n_workers_waiting--;
return false;
}
- m_workers_waiting--;
+ n_workers_waiting--;
}
- tp = m_queue.front();
- m_queue.pop();
- if (m_clients_waiting > 0) {
+ tp = queue.front();
+ queue.pop();
+ if (n_clients_waiting > 0) {
// No reason to wake up more than one client thread
- m_ccond.signal();
+ client_cond.signal();
}
return true;
}
@@ -279,23 +279,23 @@ public:
*
* This would happen after an unrecoverable error, or when
* the queue is terminated by the client. Workers never exit normally,
- * except when the queue is shut down (at which point m_ok is set to
+ * except when the queue is shut down (at which point ok is set to
* false by the shutdown code anyway). The thread must return/exit
* immediately after calling this.
*/
void workerExit()
{
- const ScopeLock protect(m_mutex);
+ const ScopeLock protect(mutex);
- m_workers_exited++;
- m_ok = false;
- m_ccond.broadcast();
+ n_workers_exited++;
+ ok = false;
+ client_cond.broadcast();
}
private:
- bool ok()
+ bool IsOK()
{
- return m_ok && m_workers_exited == 0 && !m_worker_threads.empty();
+ return ok && n_workers_exited == 0 && !threads.empty();
}
};