Fixed cppcheck issues

cppcheck/suppressions.txt

@@ -1,3 +1,4 @@
+unmatchedSuppression
 missingIncludeSystem
 unusedFunction
 useStlAlgorithm

src/block_cache.cpp

@@ -145,7 +145,7 @@ struct BlockCache::Impl : public nocopy_nomove
 
 #else
 	// Not implemented on other platforms
-	void flush() {}
+	void flush() { m_data = nullptr; }
 #endif
 
 	uint8_t* m_data = nullptr;
@@ -155,6 +155,7 @@ BlockCache::BlockCache()
 	: m_impl(new Impl())
 	, m_flushRunning(0)
 	, m_storeIndex(0)
+	, m_loadingStarted(0)
 {
 }
 
@@ -188,6 +189,11 @@ void BlockCache::load_all(SideChain& side_chain, P2PServer& server)
 		return;
 	}
 
+	// Can be only called once
+	if (m_loadingStarted.exchange(1)) {
+		return;
+	}
+
 	LOGINFO(1, "loading cached blocks");
 
 	PoolBlock block;
@@ -212,7 +218,7 @@ void BlockCache::load_all(SideChain& side_chain, P2PServer& server)
 
 void BlockCache::flush()
 {
-	if (m_flushRunning.exchange(1) == 0) {
+	if (m_flushRunning.exchange(1)) {
 		m_impl->flush();
 		m_flushRunning.store(0);
 	}

src/block_cache.h

@@ -38,6 +38,7 @@ private:
 	Impl* m_impl;
 	std::atomic<uint32_t> m_flushRunning;
 	std::atomic<uint32_t> m_storeIndex;
+	std::atomic<uint32_t> m_loadingStarted;
 };
 
 } // namespace p2pool

src/log.cpp

@@ -321,6 +321,7 @@ static Worker worker;
 
 NOINLINE Writer::Writer(Severity severity) : Stream(m_stackBuf)
 {
+	m_stackBuf[BUF_SIZE] = '\0';
 	m_buf[0] = static_cast<char>(severity);
 	m_pos = 3;
 

src/p2pool.h

@@ -35,7 +35,7 @@ class p2pool_api;
 class ZMQReader;
 struct PoolBlock;
 
-class p2pool : public MinerCallbackHandler
+class p2pool : public MinerCallbackHandler, public nocopy_nomove
 {
 public:
 	p2pool(int argc, char* argv[]);

src/side_chain.cpp

@@ -2024,7 +2024,7 @@ bool SideChain::load_config(const std::string& filename)
 	return true;
 }
 
-bool SideChain::check_config()
+bool SideChain::check_config() const
 {
 	if (m_poolName.empty()) {
 		LOGERR(1, "name can't be empty");

src/side_chain.h

@@ -99,7 +99,7 @@ private:
 	void prune_old_blocks();
 
 	bool load_config(const std::string& filename);
-	bool check_config();
+	bool check_config() const;
 
 	mutable uv_rwlock_t m_sidechainLock;
 	std::atomic<PoolBlock*> m_chainTip;