C++11y allows us to eliminate some boilerplate!

[invirt/third/libt4.git] / lock_client.cc

diff --git a/lock_client.cc b/lock_client.cc
index de357f1..ca21d9d 100644 (file)
--- a/lock_client.cc
+++ b/lock_client.cc
@@ -4,7 +4,7 @@
 #include <arpa/inet.h>
 
 void lock_state::wait(lock & mutex_lock) {
 #include <arpa/inet.h>
 
 void lock_state::wait(lock & mutex_lock) {

-    auto self = this_thread::get_id();
+    auto self = std::this_thread::get_id();

     c[self].wait(mutex_lock);
     c.erase(self);
 }
     c[self].wait(mutex_lock);
     c.erase(self);
 }

@@ -20,38 +20,33 @@ void lock_state::signal(thread::id who) {
         c[who].notify_one();
 }
 
         c[who].notify_one();
 }
 

-typedef map<lock_protocol::lockid_t, lock_state> lock_map;
-
-unsigned int lock_client::last_port = 0;
-

 lock_state & lock_client::get_lock_state(lock_protocol::lockid_t lid) {
     lock sl(lock_table_lock);
     return lock_table[lid]; // creates the lock if it doesn't already exist
 }
 
 lock_state & lock_client::get_lock_state(lock_protocol::lockid_t lid) {
     lock sl(lock_table_lock);
     return lock_table[lid]; // creates the lock if it doesn't already exist
 }
 

-lock_client::lock_client(string xdst, class lock_release_user *_lu) : lu(_lu), next_xid(0) {
-    cl = new rpcc(xdst);
-    if (cl->bind() < 0)
-        LOG("lock_client: call bind");
-
-    srandom((uint32_t)time(NULL)^last_port);
-    rlock_port = ((random()%32000) | (0x1 << 10));
-    id = "127.0.0.1:" + to_string(rlock_port);
-    last_port = rlock_port;
-    rpcs *rlsrpc = new rpcs(rlock_port);
+lock_client::lock_client(string xdst, lock_release_user *_lu) : lu(_lu), next_xid(0) {
+    rlock_port = std::uniform_int_distribution<in_port_t>(1024,32000+1024)(global->random_generator);
+    id = "127.0.0.1:" + std::to_string(rlock_port);
+    rlsrpc = std::make_unique<rpcs>(rlock_port);

     rlsrpc->reg(rlock_protocol::revoke, &lock_client::revoke_handler, this);
     rlsrpc->reg(rlock_protocol::retry, &lock_client::retry_handler, this);
     rlsrpc->reg(rlock_protocol::revoke, &lock_client::revoke_handler, this);
     rlsrpc->reg(rlock_protocol::retry, &lock_client::retry_handler, this);

-    rsmc = new rsm_client(xdst);
+    rsmc = std::make_unique<rsm_client>(xdst);

     releaser_thread = thread(&lock_client::releaser, this);
     releaser_thread = thread(&lock_client::releaser, this);

+    rlsrpc->start();

 }
 
 }
 

-void lock_client::releaser() [[noreturn]] {
-    while (1) {
-        lock_protocol::lockid_t lid;
-        release_fifo.deq(&lid);
-        LOG("Releaser: " << lid);
+lock_client::~lock_client() {
+    release_fifo.enq(nothing<lock_protocol::lockid_t>());
+    releaser_thread.join();
+}

 
 

-        lock_state &st = get_lock_state(lid);
+void lock_client::releaser() {
+    while (auto mlid = release_fifo.deq()) {
+        lock_protocol::lockid_t lid = mlid;
+        LOG << "Releaser: " << lid;
+
+        lock_state & st = get_lock_state(lid);

         lock sl(st.m);
         VERIFY(st.state == lock_state::locked && st.held_by == releaser_thread.get_id());
         st.state = lock_state::releasing;
         lock sl(st.m);
         VERIFY(st.state == lock_state::locked && st.held_by == releaser_thread.get_id());
         st.state = lock_state::releasing;

@@ -64,33 +59,27 @@ void lock_client::releaser() [[noreturn]] {
             sl.lock();
         }
         st.state = lock_state::none;
             sl.lock();
         }
         st.state = lock_state::none;

-        LOG("Lock " << lid << ": none");
+        LOG << "Lock " << lid << ": none";

         st.signal();
     }
         st.signal();
     }

-}
-
-int lock_client::stat(lock_protocol::lockid_t lid) {
-    VERIFY(0);
-    int r;
-    auto ret = (lock_protocol::status)cl->call(lock_protocol::stat, r, cl->id(), lid);
-    VERIFY (ret == lock_protocol::OK);
-    return r;
+    LOG << "Releaser stopping";

 }
 
 lock_protocol::status lock_client::acquire(lock_protocol::lockid_t lid) {
 }
 
 lock_protocol::status lock_client::acquire(lock_protocol::lockid_t lid) {

-    lock_state &st = get_lock_state(lid);
+    lock_state & st = get_lock_state(lid);

     lock sl(st.m);
     lock sl(st.m);

-    auto self = this_thread::get_id();
+    auto self = std::this_thread::get_id();

 
     // check for reentrancy
     VERIFY(st.state != lock_state::locked || st.held_by != self);
 
     // check for reentrancy
     VERIFY(st.state != lock_state::locked || st.held_by != self);

-    VERIFY(find(st.wanted_by.begin(), st.wanted_by.end(), self) == st.wanted_by.end());
+    VERIFY(std::find(st.wanted_by.begin(), st.wanted_by.end(), self)
+            == st.wanted_by.end());

 
     st.wanted_by.push_back(self);
 
     while (1) {
         if (st.state != lock_state::free)
 
     st.wanted_by.push_back(self);
 
     while (1) {
         if (st.state != lock_state::free)

-            LOG("Lock " << lid << ": not free");
+            LOG << "Lock " << lid << ": not free";

 
         if (st.state == lock_state::none || st.state == lock_state::retrying) {
             if (st.state == lock_state::none) {
 
         if (st.state == lock_state::none || st.state == lock_state::retrying) {
             if (st.state == lock_state::none) {

@@ -98,7 +87,7 @@ lock_protocol::status lock_client::acquire(lock_protocol::lockid_t lid) {
                 st.xid = next_xid++;
             }
             st.state = lock_state::acquiring;
                 st.xid = next_xid++;
             }
             st.state = lock_state::acquiring;

-            LOG("Lock " << lid << ": acquiring");
+            LOG << "Lock " << lid << ": acquiring";

             lock_protocol::status result;
             {
                 sl.unlock();
             lock_protocol::status result;
             {
                 sl.unlock();

@@ -106,10 +95,10 @@ lock_protocol::status lock_client::acquire(lock_protocol::lockid_t lid) {
                 result = (lock_protocol::status)rsmc->call(lock_protocol::acquire, r, lid, id, st.xid);
                 sl.lock();
             }
                 result = (lock_protocol::status)rsmc->call(lock_protocol::acquire, r, lid, id, st.xid);
                 sl.lock();
             }

-            LOG("acquire returned " << result);
+            LOG << "acquire returned " << result;

             if (result == lock_protocol::OK) {
                 st.state = lock_state::free;
             if (result == lock_protocol::OK) {
                 st.state = lock_state::free;

-                LOG("Lock " << lid << ": free");
+                LOG << "Lock " << lid << ": free";

             }
         }
 
             }
         }
 

@@ -121,8 +110,8 @@ lock_protocol::status lock_client::acquire(lock_protocol::lockid_t lid) {
                 st.wanted_by.pop_front();
                 st.state = lock_state::locked;
                 st.held_by = releaser_thread.get_id();
                 st.wanted_by.pop_front();
                 st.state = lock_state::locked;
                 st.held_by = releaser_thread.get_id();

-                LOG("Queuing " << lid << " for release");
-                release_fifo.enq(lid);
+                LOG << "Queuing " << lid << " for release";
+                release_fifo.enq(just(lid));

             } else if (front == self) {
                 st.wanted_by.pop_front();
                 st.state = lock_state::locked;
             } else if (front == self) {
                 st.wanted_by.pop_front();
                 st.state = lock_state::locked;

@@ -133,40 +122,40 @@ lock_protocol::status lock_client::acquire(lock_protocol::lockid_t lid) {
             }
         }
 
             }
         }
 

-        LOG("waiting...");
+        LOG << "waiting...";

         st.wait(sl);
         st.wait(sl);

-        LOG("wait ended");
+        LOG << "wait ended";

     }
 
     }
 

-    LOG("Lock " << lid << ": locked");
+    LOG << "Lock " << lid << ": locked";

     return lock_protocol::OK;
 }
 
 lock_protocol::status lock_client::release(lock_protocol::lockid_t lid) {
     return lock_protocol::OK;
 }
 
 lock_protocol::status lock_client::release(lock_protocol::lockid_t lid) {

-    lock_state &st = get_lock_state(lid);
+    lock_state & st = get_lock_state(lid);

     lock sl(st.m);
     lock sl(st.m);

-    auto self = this_thread::get_id();
+    auto self = std::this_thread::get_id();

     VERIFY(st.state == lock_state::locked && st.held_by == self);
     st.state = lock_state::free;
     VERIFY(st.state == lock_state::locked && st.held_by == self);
     st.state = lock_state::free;

-    LOG("Lock " << lid << ": free");
+    LOG << "Lock " << lid << ": free";

     if (st.wanted_by.size()) {
         auto front = st.wanted_by.front();
         if (front == releaser_thread.get_id()) {
             st.state = lock_state::locked;
             st.held_by = releaser_thread.get_id();
             st.wanted_by.pop_front();
     if (st.wanted_by.size()) {
         auto front = st.wanted_by.front();
         if (front == releaser_thread.get_id()) {
             st.state = lock_state::locked;
             st.held_by = releaser_thread.get_id();
             st.wanted_by.pop_front();

-            LOG("Queuing " << lid << " for release");
-            release_fifo.enq(lid);
+            LOG << "Queuing " << lid << " for release";
+            release_fifo.enq(just(lid));

         } else
             st.signal(front);
     }
         } else
             st.signal(front);
     }

-    LOG("Finished signaling.");
+    LOG << "Finished signaling.";

     return lock_protocol::OK;
 }
 
 rlock_protocol::status lock_client::revoke_handler(int &, lock_protocol::lockid_t lid, lock_protocol::xid_t xid) {
     return lock_protocol::OK;
 }
 
 rlock_protocol::status lock_client::revoke_handler(int &, lock_protocol::lockid_t lid, lock_protocol::xid_t xid) {

-    LOG("Revoke handler " << lid << " " << xid);
-    lock_state &st = get_lock_state(lid);
+    LOG << "Revoke handler " << lid << " " << xid;
+    lock_state & st = get_lock_state(lid);

     lock sl(st.m);
 
     if (st.state == lock_state::releasing || st.state == lock_state::none)
     lock sl(st.m);
 
     if (st.state == lock_state::releasing || st.state == lock_state::none)

@@ -179,7 +168,7 @@ rlock_protocol::status lock_client::revoke_handler(int &, lock_protocol::lockid_
         st.held_by = releaser_thread.get_id();
         if (st.wanted_by.size())
             st.wanted_by.pop_front();
         st.held_by = releaser_thread.get_id();
         if (st.wanted_by.size())
             st.wanted_by.pop_front();

-        release_fifo.enq(lid);
+        release_fifo.enq(just(lid));

     } else {
         // get in line
         st.wanted_by.push_back(releaser_thread.get_id());
     } else {
         // get in line
         st.wanted_by.push_back(releaser_thread.get_id());

@@ -188,11 +177,11 @@ rlock_protocol::status lock_client::revoke_handler(int &, lock_protocol::lockid_
 }
 
 rlock_protocol::status lock_client::retry_handler(int &, lock_protocol::lockid_t lid, lock_protocol::xid_t) {
 }
 
 rlock_protocol::status lock_client::retry_handler(int &, lock_protocol::lockid_t lid, lock_protocol::xid_t) {

-    lock_state &st = get_lock_state(lid);
+    lock_state & st = get_lock_state(lid);

     lock sl(st.m);
     VERIFY(st.state == lock_state::acquiring);
     st.state = lock_state::retrying;
     lock sl(st.m);
     VERIFY(st.state == lock_state::acquiring);
     st.state = lock_state::retrying;

-    LOG("Lock " << lid << ": none");
+    LOG << "Lock " << lid << ": none";

     st.signal(); // only one thread needs to wake up
     return rlock_protocol::OK;
 }
     st.signal(); // only one thread needs to wake up
     return rlock_protocol::OK;
 }

@@ -212,7 +201,3 @@ t4_status t4_lock_client_acquire(t4_lock_client *client, t4_lockid_t lid) {
 t4_status t4_lock_client_release(t4_lock_client *client, t4_lockid_t lid) {
     return ((lock_client *)client)->release(lid);
 }
 t4_status t4_lock_client_release(t4_lock_client *client, t4_lockid_t lid) {
     return ((lock_client *)client)->release(lid);
 }

-
-t4_status t4_lock_client_stat(t4_lock_client *client, t4_lockid_t lid) {
-    return ((lock_client *)client)->stat(lid);
-}