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Fix connector switching on Linux, and decrease the probability of a hang on shutdown

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This commit is contained in:
Simon Kornblith 2011-07-11 01:51:02 +00:00
parent 0e820b8eb3
commit 07ae9839a6
1 changed files with 27 additions and 5 deletions
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32
chrome/content/zotero/xpcom/ipc.js
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@ -91,7 +91,10 @@ Zotero.IPC = new function() {
}
}
var fd = open(path, 0x0004 | 0x0001); // O_NONBLOCK | O_WRONLY
// On OS X, O_NONBLOCK = 0x0004
// On Linux, O_NONBLOCK = 04000
// On both, O_WRONLY = 0x0001
var fd = open(path, 04000 | 0x0004 | 0x0001);
if(fd === -1) return false;
write(fd, string, string.length);
close(fd);
@ -341,7 +344,7 @@ Zotero.IPC.Pipe = new function() {
* Adds a shutdown listener for a pipe that writes "Zotero shutdown\n" to the pipe and then
* deletes it
*/
this.writeShutdownMessage = function(file) {
this.writeShutdownMessage = function(pipe, file) {
// Make sure pipe actually exists
if(!file.exists()) {
Zotero.debug("IPC: Not closing pipe "+file.path+": already deleted");
@ -350,7 +353,7 @@ Zotero.IPC.Pipe = new function() {
// Keep trying to write to pipe until we succeed, in case pipe is not yet open
Zotero.debug("IPC: Closing pipe "+file.path);
while(!Zotero.IPC.safePipeWrite(file.path, "Zotero shutdown\n")) {
while(!Zotero.IPC.safePipeWrite(file.path, "Zotero shutdown\n") && !pipe.open) {
Zotero.wait();
}
@ -373,7 +376,7 @@ Zotero.IPC.Pipe.DeferredOpen = function(file, callback) {
this._initPump();
// add shutdown listener
Zotero.addShutdownListener(Zotero.IPC.Pipe.writeShutdownMessage.bind(null, file));
Zotero.addShutdownListener(Zotero.IPC.Pipe.writeShutdownMessage.bind(null, this, file));
}
Zotero.IPC.Pipe.DeferredOpen.prototype = {
@ -411,9 +414,18 @@ Zotero.IPC.Pipe.DeferredOpen.prototype = {
createInstance(Components.interfaces.nsIInputStreamPump);
pump.init(fifoStream, -1, -1, 4096, 1, true);
pump.asyncRead(this, null);
this._openTime = Date.now();
}
};
/**
* Deferred open pipe is open if there are no pending events or it was opened > 1 second ago
*/
Zotero.IPC.Pipe.DeferredOpen.prototype.__defineGetter__("open", function() {
return Date.now() > this._openTime+1000 || !Zotero.mainThread.hasPendingEvents();
});
/**
* Listens synchronously for data on the integration pipe on a separate JS thread and reads it
* when available
@ -433,7 +445,7 @@ Zotero.IPC.Pipe.WorkerThread = function(file, callback) {
worker.postMessage({"path":file.path, "libc":Zotero.IPC.getLibcPath()});
// add shutdown listener
Zotero.addShutdownListener(Zotero.IPC.Pipe.writeShutdownMessage.bind(null, file));
Zotero.addShutdownListener(Zotero.IPC.Pipe.writeShutdownMessage.bind(null, this, file));
}
Zotero.IPC.Pipe.WorkerThread.prototype = {
@ -447,10 +459,20 @@ Zotero.IPC.Pipe.WorkerThread.prototype = {
Zotero.debug(event.data[1]);
} else if(event.data[0] === "Read") {
this._callback(event.data[1]);
} else if(event.data[0] === "Open") {
this._openTime = Date.now();
}
}
}
/**
* Worker thread gets a message once the pipe is about to open; we add 500 ms to make sure it
* actually is
*/
Zotero.IPC.Pipe.DeferredOpen.prototype.__defineGetter__("open", function() {
return Date.now() > this._openTime+500;
});
/**
* Polling mechanism for file
*