From 8a4fa58cd42b7cca4a86fe2d9913b839b554bf10 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?eray=20or=C3=A7unus?= <erayorcunus@gmail.com>
Date: Mon, 11 May 2020 05:55:57 +0300
Subject: Linux build support

---
 src/core/CdStream.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

(limited to 'src/core/CdStream.cpp')

diff --git a/src/core/CdStream.cpp b/src/core/CdStream.cpp
index 666041e1..d9978040 100644
--- a/src/core/CdStream.cpp
+++ b/src/core/CdStream.cpp
@@ -1,3 +1,4 @@
+#ifdef _WIN32
 #define WITHWINDOWS
 #include "common.h"
 
@@ -16,9 +17,8 @@ struct CdReadInfo
 	char field_C;
 	bool bLocked;
 	bool bInUse;
-	char _pad0;
 	int32 nStatus;
-	HANDLE hSemaphore;
+	HANDLE hSemaphore; // used for CdStreamSync
 	HANDLE hFile;
 	OVERLAPPED Overlapped;
 };
@@ -32,7 +32,7 @@ int32 gNumChannels;
 HANDLE gImgFiles[MAX_CDIMAGES];
 
 HANDLE _gCdStreamThread;
-HANDLE gCdStreamSema;
+HANDLE gCdStreamSema; // released when we have new thing to read(so channel is set)
 DWORD _gCdStreamThreadId;
 
 CdReadInfo *gpReadInfo;
@@ -296,6 +296,7 @@ CdStreamGetLastPosn(void)
 	return lastPosnRead;
 }
 
+// wait for channel to finish reading
 int32
 CdStreamSync(int32 channel)
 {
@@ -324,6 +325,7 @@ CdStreamSync(int32 channel)
 	if ( _gbCdStreamOverlapped && pChannel->hFile )
 	{
 		ASSERT(pChannel->hFile != nil );
+		// Beware: This is blocking call (because of last parameter)
 		if ( GetOverlappedResult(pChannel->hFile, &pChannel->Overlapped, &NumberOfBytesTransferred, TRUE) )
 			return STREAM_NONE;
 		else
@@ -406,6 +408,7 @@ WINAPI CdStreamThread(LPVOID lpThreadParameter)
 				{
 					pChannel->nStatus = STREAM_NONE;
 				}
+				// Beware: This is blocking call (because of last parameter)
 				else if ( GetLastError() == ERROR_IO_PENDING
 						&& GetOverlappedResult(pChannel->hFile, &pChannel->Overlapped, &NumberOfBytesTransferred, TRUE) )
 				{
@@ -508,3 +511,4 @@ CdStreamGetNumImages(void)
 {	
 	return gNumImages;
 }
+#endif
-- 
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