From 0f596b2a4ec68d082d82dad7f5c6a59ca445fc48 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@gmail.com>
Date: Wed, 24 Jun 2009 21:28:29 +0000
Subject: Fix const-correctness issues with dmnsn_progress*.

---
 libdimension/progress.c | 88 ++++++++++++++++++++++++++++++++-----------------
 1 file changed, 58 insertions(+), 30 deletions(-)

(limited to 'libdimension/progress.c')

diff --git a/libdimension/progress.c b/libdimension/progress.c
index dc0339c..29469a6 100644
--- a/libdimension/progress.c
+++ b/libdimension/progress.c
@@ -32,12 +32,38 @@ dmnsn_new_progress()
     progress->elements = dmnsn_new_array(sizeof(dmnsn_progress_element));
     dmnsn_array_push(progress->elements, &element);
 
-    if (pthread_cond_init(&progress->cond, NULL) != 0) {
-      dmnsn_error(DMNSN_SEVERITY_MEDIUM,
-                  "Couldn't initialize condition variable.");
+    progress->cond = malloc(sizeof(pthread_cond_t));
+    if (!progress->cond) {
+      dmnsn_delete_array(progress->elements);
+      free(progress);
+      return NULL;
+    }
+
+    progress->mutex = malloc(sizeof(pthread_mutex_t));
+    if (!progress->mutex) {
+      free(progress->cond);
+      dmnsn_delete_array(progress->elements);
+      free(progress);
+      return NULL;
+    }
+
+    if (pthread_cond_init(progress->cond, NULL) != 0) {
+      free(progress->mutex);
+      free(progress->cond);
+      dmnsn_delete_array(progress->elements);
+      free(progress);
+      return NULL;
     }
-    if (pthread_mutex_init(&progress->mutex, NULL) != 0) {
-      dmnsn_error(DMNSN_SEVERITY_MEDIUM, "Couldn't initialize mutex.");
+    if (pthread_mutex_init(progress->mutex, NULL) != 0) {
+      if (pthread_cond_destroy(progress->cond) != 0) {
+        dmnsn_error(DMNSN_SEVERITY_LOW,
+                    "Leaking condition variable in failed allocation.");
+      }
+      free(progress->mutex);
+      free(progress->cond);
+      dmnsn_delete_array(progress->elements);
+      free(progress);
+      return NULL;
     }
   }
   return progress;
@@ -49,13 +75,15 @@ void
 dmnsn_delete_progress(dmnsn_progress *progress)
 {
   if (progress) {
-    if (pthread_mutex_destroy(&progress->mutex) != 0) {
+    if (pthread_mutex_destroy(progress->mutex) != 0) {
       dmnsn_error(DMNSN_SEVERITY_LOW, "Leaking mutex.");
     }
-    if (pthread_cond_destroy(&progress->cond) != 0) {
+    if (pthread_cond_destroy(progress->cond) != 0) {
       dmnsn_error(DMNSN_SEVERITY_LOW, "Leaking condition variable.");
     }
 
+    free(progress->mutex);
+    free(progress->cond);
     dmnsn_delete_array(progress->elements);
     free(progress);
   }
@@ -68,7 +96,7 @@ int dmnsn_finish_progress(dmnsn_progress *progress)
   int retval = 1;
 
   if (progress) {
-    if (pthread_cond_broadcast(&progress->cond) != 0) {
+    if (pthread_cond_broadcast(progress->cond) != 0) {
       dmnsn_error(DMNSN_SEVERITY_MEDIUM, "Couldn't signal condition variable.");
     }
 
@@ -106,6 +134,26 @@ dmnsn_get_progress(const dmnsn_progress *progress)
   return prog;
 }
 
+/* Wait until dmnsn_get_progress(progress) >= prog */
+void
+dmnsn_wait_progress(const dmnsn_progress *progress, double prog)
+{
+  if (pthread_mutex_lock(progress->mutex) != 0) {
+    dmnsn_error(DMNSN_SEVERITY_MEDIUM, "Couldn't lock condition mutex.");
+  }
+
+  while (dmnsn_get_progress(progress) < prog) {
+    if (pthread_cond_wait(progress->cond, progress->mutex) != 0) {
+      dmnsn_error(DMNSN_SEVERITY_MEDIUM,
+                  "Couldn't wait on condition variable.");
+    }
+  }
+
+  if (pthread_mutex_unlock(progress->mutex) != 0) {
+    dmnsn_error(DMNSN_SEVERITY_MEDIUM, "Couldn't unlock condition mutex.");
+  }
+}
+
 /* A new level of algorithmic nesting */
 void
 dmnsn_new_progress_element(dmnsn_progress *progress, unsigned int total)
@@ -134,7 +182,7 @@ dmnsn_increment_progress(dmnsn_progress *progress)
       ++element->progress;
     }
 
-    if (pthread_cond_broadcast(&progress->cond) != 0) {
+    if (pthread_cond_broadcast(progress->cond) != 0) {
       dmnsn_error(DMNSN_SEVERITY_MEDIUM, "Couldn't signal condition variable.");
     }
   dmnsn_array_unlock(progress->elements);
@@ -151,28 +199,8 @@ dmnsn_progress_done(dmnsn_progress *progress)
     element = dmnsn_array_at(progress->elements, 0);
     element->progress = element->total;
 
-    if (pthread_cond_broadcast(&progress->cond) != 0) {
+    if (pthread_cond_broadcast(progress->cond) != 0) {
       dmnsn_error(DMNSN_SEVERITY_MEDIUM, "Couldn't signal condition variable.");
     }
   dmnsn_array_unlock(progress->elements);
 }
-
-/* Wait until dmnsn_get_progress(progress) >= prog */
-void
-dmnsn_wait_progress(dmnsn_progress *progress, double prog)
-{
-  if (pthread_mutex_lock(&progress->mutex) != 0) {
-    dmnsn_error(DMNSN_SEVERITY_MEDIUM, "Couldn't lock condition mutex.");
-  }
-
-  while (dmnsn_get_progress(progress) < prog) {
-    if (pthread_cond_wait(&progress->cond, &progress->mutex) != 0) {
-      dmnsn_error(DMNSN_SEVERITY_MEDIUM,
-                  "Couldn't wait on condition variable.");
-    }
-  }
-
-  if (pthread_mutex_unlock(&progress->mutex) != 0) {
-    dmnsn_error(DMNSN_SEVERITY_MEDIUM, "Couldn't unlock condition mutex.");
-  }
-}
-- 
cgit v1.2.3