X-Git-Url: http://xvm.mit.edu/gitweb/invirt/third/libt4.git/blobdiff_plain/a5f10a497bebfc680bf418193f1fd9f1ad7cc417..f0dcb6b97d6d40f67698d1f71ac26970f1776f82:/handle.cc

diff --git a/handle.cc b/handle.cc
index 5287a35..792ce40 100644
--- a/handle.cc
+++ b/handle.cc
@@ -2,103 +2,50 @@
 
 class hinfo {
 public:
-    rpcc *cl = nullptr;
-    int refcnt = 0;
-    bool del = false;
-    string m;
+    unique_ptr<rpcc> client;
+    bool valid = true;
+    string destination;
     mutex client_mutex;
-    hinfo(const string & m_) : m(m_) {}
+    hinfo(const string & destination_) : destination(destination_) {}
 };
 
-class handle_mgr {
-    private:
-        mutex mgr_mutex;
-        map<string, hinfo *> hmap;
-        void delete_handle(const string & m, lock & handle_mutex_lock);
-    public:
-        hinfo *acquire_handle(string m);
-        void release_handle(hinfo *h);
-        void delete_handle(const string & m);
-};
-
-static handle_mgr mgr;
+static mutex mgr_mutex;
+static map<string, shared_ptr<hinfo>> hmap;
 
-handle::handle(const string & m) : h(mgr.acquire_handle(m)) {}
+handle::handle(const string & destination) : destination_(destination) {
+    lock ml(mgr_mutex);
+    h = hmap[destination];
+    if (!h || !h->valid)
+        h = (hmap[destination] = make_shared<hinfo>(destination));
+}
 
 rpcc * handle::safebind() {
     if (!h)
         return nullptr;
-    lock ml(h->client_mutex);
-    if (h->del)
+    lock cl(h->client_mutex);
+    if (!h->valid)
         return nullptr;
-    if (h->cl)
-        return h->cl;
-    rpcc *cl = new rpcc(h->m);
-    LOG("trying to bind..." << h->m);
-    // The test script assumes that the failure can be detected by paxos and
-    // rsm layer within few seconds. We have to set the timeout with a small
-    // value to support the assumption.
-    // 
-    // With RPC_LOSSY=5, tests may fail due to delays and time outs.
-    int ret = cl->bind(rpcc::to(1000));
-    if (ret < 0) {
-        LOG("bind failure! " << h->m << " " << ret);
-        delete cl;
-        h->del = true;
-    } else {
-        LOG("bind succeeded " << h->m);
-        h->cl = cl;
-    }
-    return h->cl;
-}
-
-handle::~handle() {
-    if (h) mgr.release_handle(h);
-}
-
-hinfo * handle_mgr::acquire_handle(string m) {
-    lock ml(mgr_mutex);
-    hinfo *h = nullptr;
-    if (hmap.find(m) == hmap.end()) {
-        h = new hinfo(m);
-        hmap[m] = h;
-        h->refcnt++;
-    } else if (!hmap[m]->del) {
-        h = hmap[m];
-        h->refcnt++;
+    if (!h->client) {
+        unique_ptr<rpcc> client(new rpcc(h->destination));
+        LOG("bind(\"" << h->destination << "\")");
+        int ret = client->bind(milliseconds(1000));
+        if (ret < 0) {
+            LOG("bind failure! " << h->destination << " " << ret);
+            h->valid = false;
+        } else {
+            LOG("bind succeeded " << h->destination);
+            h->client = move(client);
+        }
     }
-    return h;
+    return h->client.get();
 }
 
-void handle_mgr::release_handle(hinfo *h) {
+void handle::invalidate() {
+    h.reset();
     lock ml(mgr_mutex);
-    if (--h->refcnt == 0 && h->del)
-        delete_handle(h->m, ml);
-}
-
-void handle_mgr::delete_handle(const string & m) {
-    lock ml(mgr_mutex);
-    delete_handle(m, ml);
-}
-
-void handle_mgr::delete_handle(const string & m, lock &) {
-    if (hmap.find(m) == hmap.end()) {
-        LOG("cl " << m << " isn't in cl list");
-        return;
+    if (hmap.find(destination_) != hmap.end()) {
+        hmap[destination_]->valid = false;
+        LOG_NONMEMBER("cl " << destination_ << " refcnt " << hmap[destination_].use_count());
+        hmap.erase(destination_);
     }
-    LOG("cl " << m << " refcnt " << hmap[m]->refcnt);
-    hinfo *h = hmap[m];
-    if (h->refcnt == 0) {
-        if (h->cl) {
-            h->cl->cancel();
-            delete h->cl;
-        }
-        hmap.erase(m);
-        delete h;
-    } else
-        h->del = true;
-}
-
-void invalidate_handle(const string & m) {
-    mgr.delete_handle(m);
 }