Revert some cygwin-related signature changes from [835f8e1e9d] (2010-01-22).

They were an attempt to make the cygwin port compile again, but since cygwin
is based on unix this serves no purpose any more.
Use EAGAIN in stead of EWOULDBLOCK, because in VS10+ the value of EWOULDBLOCK
is no longer the same as EAGAIN
Add tclWinError.c to the CYGWIN build.

3 files changed, 24 insertions, 17 deletions

diff --git a/win/tclWinError.c b/win/tclWinError.c
index 4fee02b..1b59dbe 100644
--- a/win/tclWinError.c
+++ b/win/tclWinError.c
@@ -12,11 +12,19 @@
 
 #include "tclInt.h"
 
+#ifndef WSAEWOULDBLOCK
+#   define WSAEWOULDBLOCK 10035L
+#endif
+
+#ifndef __WIN32__
+#   define DWORD unsigned int
+#endif
+
 /*
  * The following table contains the mapping from Win32 errors to errno errors.
  */
 
-static char errorTable[] = {
+static const unsigned char errorTable[] = {
     0,
     EINVAL,	/* ERROR_INVALID_FUNCTION	1 */
     ENOENT,	/* ERROR_FILE_NOT_FOUND		2 */
@@ -284,18 +292,16 @@ static char errorTable[] = {
     EINVAL,	/* 264 */
     EINVAL,	/* 265 */
     EINVAL,	/* 266 */
-    ENOTDIR,	/* ERROR_DIRECTORY		267 */
+    ENOTDIR	/* ERROR_DIRECTORY		267 */
 };
 
-static const unsigned int tableLen = sizeof(errorTable);
-
 /*
  * The following table contains the mapping from WinSock errors to
  * errno errors.
  */
 
-static int wsaErrorTable[] = {
-    EWOULDBLOCK,	/* WSAEWOULDBLOCK */
+static const unsigned char wsaErrorTable[] = {
+    EAGAIN,		/* WSAEWOULDBLOCK */
     EINPROGRESS,	/* WSAEINPROGRESS */
     EALREADY,		/* WSAEALREADY */
     ENOTSOCK,		/* WSAENOTSOCK */
@@ -331,7 +337,7 @@ static int wsaErrorTable[] = {
     EUSERS,		/* WSAEUSERS */
     EDQUOT,		/* WSAEDQUOT */
     ESTALE,		/* WSAESTALE */
-    EREMOTE,		/* WSAEREMOTE */
+    EREMOTE		/* WSAEREMOTE */
 };
 
 /*
@@ -352,9 +358,9 @@ static int wsaErrorTable[] = {
 
 void
 TclWinConvertError(
-    unsigned long errCode)		/* Win32 error code. */
+    DWORD errCode)		/* Win32 error code. */
 {
-    if (errCode >= tableLen) {
+    if (errCode >= sizeof(errorTable)/sizeof(errorTable[0])) {
 	Tcl_SetErrno(EINVAL);
     } else {
 	Tcl_SetErrno(errorTable[errCode]);
@@ -379,12 +385,13 @@ TclWinConvertError(
 
 void
 TclWinConvertWSAError(
-    unsigned long errCode)		/* Win32 error code. */
+    DWORD errCode)		/* Win32 error code. */
 {
-    if ((errCode >= WSAEWOULDBLOCK) && (errCode <= WSAEREMOTE)) {
-	Tcl_SetErrno(wsaErrorTable[errCode - WSAEWOULDBLOCK]);
-    } else {
+    errCode -= WSAEWOULDBLOCK;
+    if (errCode >= sizeof(wsaErrorTable)/sizeof(wsaErrorTable[0])) {
 	Tcl_SetErrno(EINVAL);
+    } else {
+	Tcl_SetErrno(wsaErrorTable[errCode]);
     }
 }
 
diff --git a/win/tclWinSerial.c b/win/tclWinSerial.c
index 0941d4a..58a9eb4 100644
--- a/win/tclWinSerial.c
+++ b/win/tclWinSerial.c
@@ -1036,7 +1036,7 @@ SerialOutputProc(
 	 * the channel is in non-blocking mode.
 	 */
 
-	errno = EWOULDBLOCK;
+	errno = EAGAIN;
 	goto error1;
     }
 
diff --git a/win/tclWinSock.c b/win/tclWinSock.c
index 0c1a270..60cc313 100644
--- a/win/tclWinSock.c
+++ b/win/tclWinSock.c
@@ -1195,7 +1195,7 @@ CreateSocket(
 		if (connect(sock, addrPtr->ai_addr, addrPtr->ai_addrlen)
 		    == SOCKET_ERROR) {
 		    TclWinConvertWSAError((DWORD) WSAGetLastError());
-		    if (Tcl_GetErrno() != EWOULDBLOCK) {
+		    if (Tcl_GetErrno() != EAGAIN) {
 			goto looperror;
 		    }
 
@@ -1389,7 +1389,7 @@ WaitForSocketEvent(
 	} else if (infoPtr->readyEvents & events) {
 	    break;
 	} else if (infoPtr->flags & SOCKET_ASYNC) {
-	    *errorCodePtr = EWOULDBLOCK;
+	    *errorCodePtr = EAGAIN;
 	    result = 0;
 	    break;
 	}
@@ -1913,7 +1913,7 @@ TcpOutputProc(
 	if (error == WSAEWOULDBLOCK) {
 	    infoPtr->readyEvents &= ~(FD_WRITE);
 	    if (infoPtr->flags & SOCKET_ASYNC) {
-		*errorCodePtr = EWOULDBLOCK;
+		*errorCodePtr = EAGAIN;
 		bytesWritten = -1;
 		break;
 	    }