Fixed some false positive clang analysis warnings.

src/bgfx.cpp

@@ -578,6 +578,10 @@ namespace bgfx
 					fragMem[ii] = makeRef(mem[ii].data, uint32_t(mem[ii].size) );
 				}
 			}
+			else
+			{
+				BGFX_FATAL(false, Fatal::UnableToInitialize, "Unknown renderer type %d", g_caps.rendererType);
+			}
 
 			for (uint32_t ii = 0, num = g_caps.maxFBAttachments; ii < num; ++ii)
 			{
@@ -1419,25 +1423,32 @@ again:
 
 		bool end = false;
 
-		do
+		if (NULL == m_renderCtx)
 		{
 			uint8_t command;
 			_cmdbuf.read(command);
 
-			switch (command)
-			{
-			case CommandBuffer::RendererInit:
-				{
-					BX_CHECK(!m_rendererInitialized, "This shouldn't happen! Bad synchronization?");
+			BX_CHECK(CommandBuffer::RendererInit == command
+				, "RendererInit must be the first command in command buffer before initialization."
+				);
+			BX_CHECK(!m_rendererInitialized, "This shouldn't happen! Bad synchronization?");
 
-					RendererType::Enum type;
-					_cmdbuf.read(type);
+			RendererType::Enum type;
+			_cmdbuf.read(type);
 
-					m_renderCtx = rendererCreate(type);
-					m_rendererInitialized = true;
-				}
-				break;
+			m_renderCtx = rendererCreate(type);
+			m_rendererInitialized = true;
+		}
+
+		BX_CHECK(NULL != m_renderCtx, "Should not be NULL at this point.");
 
+		do
+		{
+			uint8_t command;
+			_cmdbuf.read(command);
+
+			switch (command)
+			{
 			case CommandBuffer::RendererShutdownBegin:
 				{
 					BX_CHECK(m_rendererInitialized, "This shouldn't happen! Bad synchronization?");
@@ -1452,6 +1463,10 @@ again:
 					m_renderCtx = NULL;
 					m_exit = true;
 				}
+				// fallthrough
+
+			case CommandBuffer::End:
+				end = true;
 				break;
 
 			case CommandBuffer::CreateIndexBuffer:
@@ -1834,10 +1849,6 @@ again:
 				}
 				break;
 
-			case CommandBuffer::End:
-				end = true;
-				break;
-
 			default:
 				BX_CHECK(false, "Invalid command: %d", command);
 				break;

src/bgfx_p.h

@@ -6,11 +6,13 @@
 #ifndef BGFX_P_H_HEADER_GUARD
 #define BGFX_P_H_HEADER_GUARD
 
+#include <bx/platform.h>
+
 #ifndef BGFX_CONFIG_DEBUG
 #	define BGFX_CONFIG_DEBUG 0
 #endif // BGFX_CONFIG_DEBUG
 
-#if BGFX_CONFIG_DEBUG || defined(__clang_analyzer__)
+#if BGFX_CONFIG_DEBUG || BX_COMPILER_CLANG_ANALYZER
 #	define BX_TRACE _BX_TRACE
 #	define BX_WARN  _BX_WARN
 #	define BX_CHECK _BX_CHECK
@@ -29,11 +31,11 @@
 
 namespace bgfx
 {
-#if defined(__clang_analyzer__)
+#if BX_COMPILER_CLANG_ANALYZER
 	void __attribute__((analyzer_noreturn)) fatal(Fatal::Enum _code, const char* _format, ...);
 #else
 	void fatal(Fatal::Enum _code, const char* _format, ...);
-#endif // defined(__clang_analyzer__)
+#endif // BX_COMPILER_CLANG_ANALYZER
 
 	void dbgPrintf(const char* _format, ...);
 }
@@ -1766,6 +1768,7 @@ namespace bgfx
 			, m_instBufferCount(0)
 			, m_frames(0)
 			, m_debug(BGFX_DEBUG_NONE)
+			, m_renderCtx(NULL)
 			, m_rendererInitialized(false)
 			, m_exit(false)
 		{