From 464a0df4c1d3e4073fe0bde506ac1d4aa194b02f Mon Sep 17 00:00:00 2001 From: Nat Goodspeed Date: Thu, 30 Jun 2016 16:51:50 -0400 Subject: DRTVWR-418: Unify control flow through LLAppViewer across platforms. The LLApp API used to consist of init(), mainLoop(), cleanup() methods. This makes sense -- but on Mac that structure was being subverted. The method called mainLoop() was in fact being called once per frame. There was initialization code in the method, which (on Mac) needed to be skipped with an already-initialized bool. There was a 'while' loop which (on Mac) needed to be turned into an 'if' instead so the method would return after every frame. Rename LLApp::mainLoop() to frame(). Propagate through subclasses LLAppViewer and LLCrashLogger. Document the fact that frame() returns true to mean "done." (This was always the case, but had to be inferred from the code.) Rename the Mac Objective-C function mainLoop to oneFrame. Rename the C++ free function it calls from runMainLoop() to pumpMainLoop(). Add comments to llappdelegate-objc.mm explaining (inferred) control flow. Change the Linux viewer main() and the Windows viewer WINMAIN() from a single LLAppViewer::mainLoop() call to repeatedly call frame() until it returns true. Move initialization code from the top of LLAppViewer::frame() to the init() method, where it more properly belongs. Remove corresponding mMainLoopInitialized flag (and all references) from LLAppViewer. Remove 'while (! LLApp::isExiting())' (or on Mac, 'if (! LLApp::isExiting())') from LLAppViewer::frame() -- thus unindenting the whole body of the 'while' and causing many lines of apparent change. (Apologies to reviewers.) There are four LLApp states: APP_STATUS_RUNNING, APP_STATUS_QUITTING, APP_STATUS_STOPPED and APP_STATUS_ERROR. Change LLAppViewer::frame() return value from (isExiting()) (QUITTING or ERROR) to (! isRunning()). I do not know under what circumstances the state might transition to STOPPED during a frame() call, but I'm quite sure that if it does, we don't want to call frame() again. We only want a subsequent call if the state is RUNNING. Also rename mainLoop() method in LLCrashLogger subclasses LLCrashLoggerWindows, LLCrashLoggerMac, LLCrashLoggerLinux. Of course it's completely up to the frame() method whether to yield control; none of those in fact do. Honor protocol by returning true (frame() is done), even though each one's main() caller ignores the return value. In fact LLCrashLoggerWindows::mainLoop() wasn't using the return protocol correctly anyway, returning wParam or 0 or 1 -- possibly because the return protocol was never explicitly documented. It should always return true: "I'm done, don't call me again." --- indra/newview/llappviewerwin32.cpp | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'indra/newview/llappviewerwin32.cpp') diff --git a/indra/newview/llappviewerwin32.cpp b/indra/newview/llappviewerwin32.cpp index 4786f83bfd..a7f248ab5a 100644 --- a/indra/newview/llappviewerwin32.cpp +++ b/indra/newview/llappviewerwin32.cpp @@ -317,10 +317,8 @@ int APIENTRY WINMAIN(HINSTANCE hInstance, } // Run the application main loop - if(!LLApp::isQuitting()) - { - viewer_app_ptr->mainLoop(); - } + while (! viewer_app_ptr->frame()) + {} if (!LLApp::isError()) { -- cgit v1.2.3