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Use blocking IO to make sure that pipes are open instead of Zotero.wait() in ipc.js. This also removes our safeguard against hanging the browser if for some reason the pipe gets closed, but it should be okay :-/

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This commit is contained in:
Simon Kornblith 2011-09-22 05:36:01 +00:00
parent e1cc377162
commit 5e67753b73
1 changed files with 15 additions and 31 deletions
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46
chrome/content/zotero/xpcom/ipc.js
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@ -94,12 +94,13 @@ Zotero.IPC = new function() {
}
/**
* Writes safely to a file, avoiding blocking
* @param {nsIFile} pipe The pipe as an nsIFile
* @param {String} string The string to write to the file
* Writes safely to a file, avoiding blocking.
* @param {nsIFile} pipe The pipe as an nsIFile.
* @param {String} string The string to write to the file.
* @param {Boolean} [block] Whether we should block. Usually, we don't want this.
* @return {Boolean} True if write succeeded; false otherwise
*/
this.safePipeWrite = function(pipe, string) {
this.safePipeWrite = function(pipe, string, block) {
if(!open) {
// safely write to instance pipes
var lib = Zotero.IPC.getLibc();
@ -128,7 +129,8 @@ Zotero.IPC = new function() {
// On OS X, O_NONBLOCK = 0x0004
// On Linux, O_NONBLOCK = 00004000
// On both, O_WRONLY = 0x0001
var mode = (Zotero.isMac ? 0x0004 : 00004000) | 0x0001;
var mode = 0x0001;
if(!block) mode = mode | (Zotero.isMac ? 0x0004 : 00004000);
// Also append to plain files to get things working with Fx 3.6 polling
// On OS X, O_APPEND = 0x0008
@ -228,14 +230,6 @@ Zotero.IPC = new function() {
user32.close();
return false;
} else { // communicate via pipes
// make sure instance pipe is open and accepting input, or ignore if it has been deleted
if(!instancePipeOpen && _instancePipe.exists()) {
while(!Zotero.IPC.safePipeWrite(_instancePipe, "test\n")) {
Zotero.wait();
}
instancePipeOpen = true;
}
// look for other Zotero instances
var pipes = [];
var pipeDir = _getPipeDirectory();
@ -271,6 +265,13 @@ Zotero.IPC = new function() {
}
if(!defunct) {
// make sure instance pipe is open and accepting input, so that we can receive
// a response to whatever we're sending
if(!instancePipeOpen && _instancePipe.exists()) {
Zotero.IPC.safePipeWrite(_instancePipe, "test\n", true);
instancePipeOpen = true;
}
var wroteToPipe = Zotero.IPC.safePipeWrite(pipe, msg+"\n");
success = success || wroteToPipe;
defunct = !wroteToPipe
@ -415,9 +416,7 @@ 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, "Zotero shutdown\n") && !pipe.open) {
Zotero.wait();
}
Zotero.IPC.safePipeWrite(file, "Zotero shutdown\n", true);
// Delete pipe
file.remove(false);
@ -481,13 +480,6 @@ Zotero.IPC.Pipe.DeferredOpen.prototype = {
}
};
/**
* 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
@ -527,14 +519,6 @@ Zotero.IPC.Pipe.WorkerThread.prototype = {
}
}
/**
* 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
*