Remove typedef Q_PID

It is not used in public API any more since
0f8848b7e2.

Replace by an internal Windows-specific Q_PROCESS_INFORMATION typedef.

Change-Id: Ia6dcc83ca667c40ac5d678c00d143c09d650e42a
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/io/qprocess.cpp

@@ -2504,17 +2504,6 @@ QString QProcess::nullDevice()
 #endif
 }
 
-/*!
-    \typedef Q_PID
-    \relates QProcess
-
-    Typedef for the identifiers used to represent processes on the underlying
-    platform. On Unix, this corresponds to \l qint64; on Windows, it
-    corresponds to \c{_PROCESS_INFORMATION*}.
-
-    \sa QProcess::processId()
-*/
-
 #endif // QT_CONFIG(process)
 
 QT_END_NAMESPACE

src/corelib/io/qprocess.h

@@ -48,13 +48,13 @@
 
 QT_REQUIRE_CONFIG(processenvironment);
 
-#ifdef Q_OS_WIN
-typedef struct _PROCESS_INFORMATION *Q_PID;
-#endif
-
 #if defined(Q_OS_WIN) || defined(Q_CLANG_QDOC)
-typedef struct _SECURITY_ATTRIBUTES Q_SECURITY_ATTRIBUTES;
-typedef struct _STARTUPINFOW Q_STARTUPINFO;
+struct _PROCESS_INFORMATION;
+struct _SECURITY_ATTRIBUTES;
+struct _STARTUPINFOW;
+using Q_PROCESS_INFORMATION = _PROCESS_INFORMATION;
+using Q_SECURITY_ATTRIBUTES = _SECURITY_ATTRIBUTES;
+using Q_STARTUPINFO = _STARTUPINFOW;
 #endif
 
 QT_BEGIN_NAMESPACE
@@ -62,10 +62,6 @@ QT_BEGIN_NAMESPACE
 class QProcessPrivate;
 class QProcessEnvironmentPrivate;
 
-#ifndef Q_OS_WIN
-typedef qint64 Q_PID;
-#endif
-
 class Q_CORE_EXPORT QProcessEnvironment
 {
 public:
@@ -200,7 +196,7 @@ public:
         void *environment;
         const wchar_t *currentDirectory;
         Q_STARTUPINFO *startupInfo;
-        Q_PID processInformation;
+        Q_PROCESS_INFORMATION *processInformation;
     };
     typedef std::function<void(CreateProcessArguments *)> CreateProcessArgumentModifier;
     CreateProcessArgumentModifier createProcessArgumentsModifier() const;

src/corelib/io/qprocess_p.h

@@ -302,8 +302,12 @@ public:
     QProcess::ProcessError processError = QProcess::UnknownError;
     QProcess::ProcessState processState = QProcess::NotRunning;
     QString workingDirectory;
-    Q_PID pid = 0;
-    int sequenceNumber = 0;
+#ifdef Q_OS_WIN
+    Q_PROCESS_INFORMATION *pid = nullptr;
+#else
+    qint64 pid = 0;
+#endif
+    int sequenceNumber;
 
     bool dying = false;
     bool emittedReadyRead = false;

src/corelib/io/qprocess_unix.cpp

@@ -503,7 +503,7 @@ void QProcessPrivate::startProcess()
         ::_exit(-1);
     }
 
-    pid = Q_PID(childPid);
+    pid = qint64(childPid);
 
     // parent
     // close the ends we don't use and make all pipes non-blocking