Changeset 37d188f for global.c

Timestamp:

Mar 25, 2011, 3:46:46 AM (13 years ago)

Author:

David Benjamin <davidben@mit.edu>

Children:

0af5f9d

Parents:

87833a8

git-author:

David Benjamin <davidben@mit.edu> (02/26/11 14:38:04)

git-committer:

David Benjamin <davidben@mit.edu> (03/25/11 03:46:46)

Message:

Allow interrupts to be taken at any point

This way we can catch SIGINT in the middle of a search if we care.
(Though ideally we wouldn't block the event loop when searching like
this.)

File:

• global.c (modified) (2 diffs)

global.c

@@ -113 +113 @@
   g->timerlist = NULL;
   g->kill_buffer = NULL;
+
+  g->interrupt_count = 0;
+  g->interrupt_lock = g_mutex_new();
 }
 
@@ -930 +933 @@
   g->kill_buffer = g_strndup(kill, len);
 }
+
+void owl_global_add_interrupt(owl_global *g) {
+  /* TODO: This can almost certainly be done with atomic
+   * operations. Whatever. */
+  g_mutex_lock(g->interrupt_lock);
+  g->interrupt_count++;
+  g_mutex_unlock(g->interrupt_lock);
+}
+
+bool owl_global_take_interrupt(owl_global *g) {
+  bool ans = false;
+  g_mutex_lock(g->interrupt_lock);
+  if (g->interrupt_count > 0) {
+    ans = true;
+    g->interrupt_count--;
+  }
+  g_mutex_unlock(g->interrupt_lock);
+  return ans;
+}