feedc0de/qt-creator
1
0
Fork 0
forked from qt-creator/qt-creator
Code Pull Requests Activity

CDB extension: Introduce StateNotificationBlocker.

Browse Source 
Use RAI instead of manual bookkeeping when temporarily blocking
the state notifications of the extension context.

Change-Id: I991a3f0ddc578058f6bce173b4fc68ce567627ab
Reviewed-by: David Schulz <david.schulz@digia.com>
This commit is contained in:
Friedemann Kleint
2014-02-24 10:01:01 +01:00
parent 24722baa5f
commit 280d7f2a61
2 changed files with 27 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
src/libs/qtcreatorcdbext/extensioncontext.cpp
View File

@@ -53,6 +53,29 @@ Parameters::Parameters() : maxStringLength(10000), maxStackDepth(1000)
{
}
/*! \class StateNotificationBlocker
Blocks state (stopped) notification of ExtensionContext while instantiated
\ingroup qtcreatorcdbext
*/
class StateNotificationBlocker {
StateNotificationBlocker(const StateNotificationBlocker &);
StateNotificationBlocker &operator=(const StateNotificationBlocker &);
public:
StateNotificationBlocker(ExtensionContext *ec)
: m_oldValue(ec->stateNotification())
, m_extensionContext(ec)
{ m_extensionContext->setStateNotification(false); }
~StateNotificationBlocker() { m_extensionContext->setStateNotification(m_oldValue); }
private:
const bool m_oldValue;
ExtensionContext *m_extensionContext;
};
/*! \class ExtensionContext
Global singleton with context.
@@ -350,18 +373,15 @@ bool ExtensionContext::call(const std::string &functionCall,
}
// Wait until finished
startRecordingOutput();
m_stateNotification = false;
StateNotificationBlocker blocker(this);
m_control->WaitForEvent(0, INFINITE);
*output = stopRecordingOutput();
m_stateNotification = true;
// Crude attempt at recovering from a crash: Issue 'gN' (go with exception not handled).
const bool crashed = output->find(L"This exception may be expected and handled.") != std::string::npos;
if (crashed) {
m_stopReason.clear();
m_stateNotification = false;
hr = m_control->Execute(DEBUG_OUTCTL_ALL_CLIENTS, "~. gN", DEBUG_EXECUTE_ECHO);
m_control->WaitForEvent(0, INFINITE);
m_stateNotification = true;
*errorMessage = "A crash occurred while calling: " + functionCall;
return false;
}