Use LOCK macros for non-recursive locks

Instead of std::unique_lock.

src/random.cpp

@@ -12,6 +12,7 @@
 #include <wincrypt.h>
 #endif
 #include <logging.h>  // for LogPrint()
+#include <sync.h>     // for WAIT_LOCK
 #include <utiltime.h> // for GetTime()
 
 #include <stdlib.h>
@@ -295,7 +296,7 @@ void RandAddSeedSleep()
 }
 
 
-static std::mutex cs_rng_state;
+static CWaitableCriticalSection cs_rng_state;
 static unsigned char rng_state[32] = {0};
 static uint64_t rng_counter = 0;
 
@@ -305,7 +306,7 @@ static void AddDataToRng(void* data, size_t len) {
     hasher.Write((const unsigned char*)data, len);
     unsigned char buf[64];
     {
-        std::unique_lock<std::mutex> lock(cs_rng_state);
+        WAIT_LOCK(cs_rng_state, lock);
         hasher.Write(rng_state, sizeof(rng_state));
         hasher.Write((const unsigned char*)&rng_counter, sizeof(rng_counter));
         ++rng_counter;
@@ -337,7 +338,7 @@ void GetStrongRandBytes(unsigned char* out, int num)
 
     // Combine with and update state
     {
-        std::unique_lock<std::mutex> lock(cs_rng_state);
+        WAIT_LOCK(cs_rng_state, lock);
         hasher.Write(rng_state, sizeof(rng_state));
         hasher.Write((const unsigned char*)&rng_counter, sizeof(rng_counter));
         ++rng_counter;