Use std::unique_ptr instead of auto_ptr.

[domob1812]

With C++11 available, we can use std::unique_ptr instead of the (now deprecated) std::auto_ptr. Also use std::unique_ptr in httpserver.cpp to resolve an "XXX remark" there and simplify the code.

[sipa]

have you seen #7964?

[domob1812]

Ah, this contains parts of my patch, but not the WorkQueue change. I suggest to rebase this once #7964 is merged.

[sipa]

Perhaps also see #7966.

[maflcko]

diff between the existing pulls and this one:

diff --git a/src/chain.h b/src/chain.h
index 017d4fe..5b9605a 100644
--- a/src/chain.h
+++ b/src/chain.h
@@ -54,7 +54,7 @@ struct CDiskBlockPos

 };

-enum BlockStatus: uint32_t {
+enum BlockStatus {
     //! Unused.
     BLOCK_VALID_UNKNOWN      =    0,

diff --git a/src/httpserver.cpp b/src/httpserver.cpp
index 55c81c1..64a0c31 100644
--- a/src/httpserver.cpp
+++ b/src/httpserver.cpp
@@ -34,6 +34,10 @@
 #endif
 #endif

+#include <deque>
+#include <memory>
+#include <utility>
+
 #include <boost/algorithm/string/case_conv.hpp> // for to_lower()
 #include <boost/foreach.hpp>
 #include <boost/scoped_ptr.hpp>
@@ -100,20 +104,14 @@ public:
                                  numThreads(0)
     {
     }
-    /*( Precondition: worker threads have all stopped
-     * (call WaitExit)
-     */
-    ~WorkQueue()
-    {
-    }
     /** Enqueue a work item */
-    bool Enqueue(std::unique_ptr<WorkItem> item)
+    bool Enqueue(WorkItem* item)
     {
         boost::unique_lock<boost::mutex> lock(cs);
         if (queue.size() >= maxDepth) {
             return false;
         }
-        queue.push_back(std::move(item));
+        queue.push_back(std::unique_ptr<WorkItem>(item));
         cond.notify_one();
         return true;
     }
@@ -284,7 +282,9 @@ static void http_request_cb(struct evhttp_request* req, void* arg)
     if (i != iend) {
         std::unique_ptr<HTTPWorkItem> item(new HTTPWorkItem(hreq.release(), path, i->handler));
         assert(workQueue);
-        if (!workQueue->Enqueue(std::move(item)))
+        if (workQueue->Enqueue(item.get()))
+            item.release(); /* if true, queue took ownership */
+        else
             item->req->WriteReply(HTTP_INTERNAL, "Work queue depth exceeded");
     } else {
         hreq->WriteReply(HTTP_NOTFOUND);
diff --git a/src/miner.cpp b/src/miner.cpp
index eaf29a7..d4aec3c 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -27,6 +27,7 @@

 #include <boost/thread.hpp>
 #include <boost/tuple/tuple.hpp>
+#include <memory>
 #include <queue>

 using namespace std;
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index 9a7d9d5..eeb8675 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -21,6 +21,7 @@
 #include "utilstrencodings.h"
 #include "validationinterface.h"

+#include <memory>
 #include <stdint.h>

 #include <boost/assign/list_of.hpp>

[domob1812]

Well, ok, I guess then nothing remains of this patch and the PR can be closed....

[laanwj]

Right, the overlap with other pulls is too large, closing.