# HG changeset patch
# User Jerome LAFORGE
# Date 1315058971 -7200
# Node ID 99b48eeeef711990c08473a71541e524ddf7ca3c
# Parent  87da4634b76fb779e054d579989f496c8e78db70
Ensure unique instance when check.if.already.open is set.
Bug #3363754.

diff -r 87da4634b76f -r 99b48eeeef71 gtk/SciTEGTK.cxx
--- a/gtk/SciTEGTK.cxx  Sun Aug 21 10:31:44 2011 +0200
+++ b/gtk/SciTEGTK.cxx  Sat Sep 03 16:09:31 2011 +0200
@@ -106,6 +106,7 @@
 }

 const char appName[] = "SciTE";
+static char uniqueInstance[MAX_PATH];

 static GtkWidget *PWidget(GUI::Window &w) {
    return reinterpret_cast<GtkWidget *>(w.GetID());
@@ -4351,6 +4352,15 @@
    char *pipeFileName = NULL;
    const char *filename;

+   sprintf(uniqueInstance,"%s/SciTE.ensure.unique.instance.for.%s", g_get_tmp_dir(), getenv("USER"));
+   int fd = -2;
+   do {
+       if (fd == -1)
+           usleep(50000); // Currently, another process of SciTE is launching. We are waiting for end of its initialisation.
+       fd = open(uniqueInstance, O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
+   } while (fd == -1 && errno == EEXIST);
+   if (fd != -1)
+       close(fd);
    // Find a working pipe in our temporary directory
    while ((filename = g_dir_read_name(dir))) {
        if (g_pattern_match_string(pattern, filename)) {
@@ -4386,6 +4396,7 @@
        // We need to call this since we're not displaying a window
        gdk_notify_startup_complete();
        g_free(pipeFileName);
+       unlink(uniqueInstance);
        return true;
    }

@@ -4429,6 +4440,8 @@
    }

    CreateUI();
+   if ((props.Get("ipc.director.name").size() == 0) && props.GetInt ("check.if.already.open"))
+       unlink(uniqueInstance);

    // Process remaining switches and files
    ProcessCommandLine(args, 1);