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Make MessageQueue thread-safe

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This commit is contained in:
Benau 2017-03-22 08:40:58 +08:00
parent 668b28f632
commit 2b9a84253a
1 changed files with 35 additions and 17 deletions
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52
src/guiengine/message_queue.cpp
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@ -24,6 +24,7 @@
#include "guiengine/engine.hpp"
#include "guiengine/scalable_font.hpp"
#include "guiengine/skin.hpp"
#include "utils/synchronised.hpp"
#include "IGUIElement.h"
@ -88,11 +89,10 @@ public:
} // operator ()
}; // operator()
// ============================================================================
/** List of all messages. */
std::priority_queue<Message*, std::vector<Message*>,
CompareMessages> g_all_messages;
Synchronised<std::priority_queue<Message*, std::vector<Message*>,
CompareMessages> > g_all_messages;
/** How long the current message has been displayed. The special value
* -1 indicates that a new message was added when the queue was empty. */
@ -130,9 +130,16 @@ void createLabel(const Message *message)
* position of the message. */
void updatePosition()
{
if (g_all_messages.empty()) return;
Message *last = g_all_messages.top();
g_all_messages.lock();
bool empty = g_all_messages.getData().empty();
if (empty)
{
g_all_messages.unlock();
return;
}
Message *last = g_all_messages.getData().top();
createLabel(last);
g_all_messages.unlock();
} // updatePosition
// ----------------------------------------------------------------------------
@ -143,13 +150,15 @@ void updatePosition()
void add(MessageType mt, const irr::core::stringw &message)
{
Message *m = new Message(mt, message);
if(g_all_messages.empty())
g_all_messages.lock();
if (g_all_messages.getData().empty())
{
// Indicate that there is a new message, which should
// which needs a new label etc. to be computed.
g_current_display_time =-1.0f;
}
g_all_messages.push(m);
g_all_messages.getData().push(m);
g_all_messages.unlock();
} // add
// ----------------------------------------------------------------------------
@ -161,32 +170,41 @@ void add(MessageType mt, const irr::core::stringw &message)
*/
void update(float dt)
{
if(g_all_messages.empty()) return;
g_all_messages.lock();
bool empty = g_all_messages.getData().empty();
g_all_messages.unlock();
if (empty) return;
g_all_messages.lock();
g_current_display_time += dt;
if(g_current_display_time > g_max_display_time)
if (g_current_display_time > g_max_display_time)
{
Message *last = g_all_messages.top();
g_all_messages.pop();
Message *last = g_all_messages.getData().top();
g_all_messages.getData().pop();
delete last;
if(g_all_messages.empty()) return;
if (g_all_messages.getData().empty())
{
g_all_messages.unlock();
return;
}
g_current_display_time = -1.0f;
}
Message *current = g_all_messages.getData().top();
// Create new data for the display.
if(g_current_display_time < 0)
if (g_current_display_time < 0)
{
createLabel(g_all_messages.top());
createLabel(current);
}
g_all_messages.unlock();
Message *current = g_all_messages.top();
GUIEngine::getSkin()->drawMessage(g_container, g_area,
current->getRenderType());
gui::ScalableFont *font = GUIEngine::getFont();
video::SColor color(255, 0, 0, 0);
font->draw(current->getMessage(), g_area, color, true, true);
} // update
} // namespace GUIEngine