align gradient with meter-metrics

[ardour.git] / libs / pbd / pool.cc

diff --git a/libs/pbd/pool.cc b/libs/pbd/pool.cc
index abb8695c23016b56ce26aa781d844f5f5f9ecf1f..7b24625727dc1d05dff0c2554a8c6398925f544a 100644 (file)
--- a/libs/pbd/pool.cc
+++ b/libs/pbd/pool.cc
@@ -19,13 +19,14 @@
 */
 
 #include <cstdlib>
-#include <iostream>
 #include <vector>
 #include <cstdlib>
 #include <cassert>
 
 #include "pbd/pool.h"
 #include "pbd/error.h"
+#include "pbd/debug.h"
+#include "pbd/compose.h"
 
 using namespace std;
 using namespace PBD;
@@ -86,37 +87,27 @@ Pool::release (void *ptr)
 
 MultiAllocSingleReleasePool::MultiAllocSingleReleasePool (string n, unsigned long isize, unsigned long nitems) 
        : Pool (n, isize, nitems)
-       , m_lock(0)
 {
 }
 
 MultiAllocSingleReleasePool::~MultiAllocSingleReleasePool ()
 {
-    delete m_lock;
 }
 
 SingleAllocMultiReleasePool::SingleAllocMultiReleasePool (string n, unsigned long isize, unsigned long nitems) 
        : Pool (n, isize, nitems)
-       , m_lock(0)
 {
 }
 
 SingleAllocMultiReleasePool::~SingleAllocMultiReleasePool ()
 {
-    delete m_lock;
 }
 
 void*
 MultiAllocSingleReleasePool::alloc ()
 {
        void *ptr;
-    if(!m_lock) {
-        m_lock = new Glib::Mutex();
-        // umm, I'm not sure that this doesn't also allocate memory.
-        if(!m_lock) error << "cannot create Glib::Mutex in pool.cc" << endmsg;
-    }
-    
-    Glib::Mutex::Lock guard(*m_lock);
+       Glib::Threads::Mutex::Lock guard (m_lock);
        ptr = Pool::alloc ();
        return ptr;
 }
@@ -136,12 +127,7 @@ SingleAllocMultiReleasePool::alloc ()
 void
 SingleAllocMultiReleasePool::release (void* ptr)
 {
-    if(!m_lock) {
-        m_lock = new Glib::Mutex();
-        // umm, I'm not sure that this doesn't also allocate memory.
-        if(!m_lock) error << "cannot create Glib::Mutex in pool.cc" << endmsg;
-    }
-    Glib::Mutex::Lock guard(*m_lock);
+       Glib::Threads::Mutex::Lock guard (m_lock);
        Pool::release (ptr);
 }
 
@@ -157,19 +143,24 @@ free_per_thread_pool (void* ptr)
        CrossThreadPool* cp = static_cast<CrossThreadPool*> (ptr);
        assert (cp);
 
-       cp->parent()->add_to_trash (cp);
+       if (cp->empty()) {
+               /* This CrossThreadPool is already empty, and the thread is finishing so nothing
+                * more can be added to it.  We can just delete the pool.
+                */
+               delete cp;
+       } else {
+               /* This CrossThreadPool is not empty, meaning that there's some Events in it
+                * which another thread may yet read, so we can't delete the pool just yet.
+                * Put it in the trash and hope someone deals with it at some stage.
+                */
+               cp->parent()->add_to_trash (cp);
+       }
 }
  
 PerThreadPool::PerThreadPool ()
-       : _trash (0)
+       : _key (free_per_thread_pool)
+       , _trash (0)
 {
-       {
-               /* for some reason this appears necessary to get glib's thread private stuff to work */
-               GPrivate* key;
-               key = g_private_new (NULL);
-       }
-
-       _key = g_private_new (free_per_thread_pool);
 }
 
 /** Create a new CrossThreadPool and set the current thread's private _key to point to it.
@@ -180,8 +171,7 @@ PerThreadPool::PerThreadPool ()
 void
 PerThreadPool::create_per_thread_pool (string n, unsigned long isize, unsigned long nitems)
 {
-       CrossThreadPool* p = new CrossThreadPool (n, isize, nitems, this);
-       g_private_set (_key, p);
+       _key.set (new CrossThreadPool (n, isize, nitems, this));
 }
 
 /** @return CrossThreadPool for the current thread, which must previously have been created by
@@ -190,7 +180,7 @@ PerThreadPool::create_per_thread_pool (string n, unsigned long isize, unsigned l
 CrossThreadPool*
 PerThreadPool::per_thread_pool ()
 {
-       CrossThreadPool* p = static_cast<CrossThreadPool*> (g_private_get (_key));
+       CrossThreadPool* p = _key.get();
        if (!p) {
                fatal << "programming error: no per-thread pool \"" << _name << "\" for thread " << pthread_self() << endmsg;
                /*NOTREACHED*/
@@ -201,7 +191,7 @@ PerThreadPool::per_thread_pool ()
 void
 PerThreadPool::set_trash (RingBuffer<CrossThreadPool*>* t)
 {
-       Glib::Mutex::Lock lm (_trash_mutex);
+       Glib::Threads::Mutex::Lock lm (_trash_mutex);
        _trash = t;
 }
 
@@ -209,7 +199,7 @@ PerThreadPool::set_trash (RingBuffer<CrossThreadPool*>* t)
 void
 PerThreadPool::add_to_trash (CrossThreadPool* p)
 {
-       Glib::Mutex::Lock lm (_trash_mutex);
+       Glib::Threads::Mutex::Lock lm (_trash_mutex);
        
        if (!_trash) {
                warning << "Pool " << p->name() << " has no trash collector; a memory leak has therefore occurred" << endmsg;
@@ -235,7 +225,10 @@ void*
 CrossThreadPool::alloc () 
 {
        void* ptr;
+
+       DEBUG_TRACE (DEBUG::Pool, string_compose ("%1 %2 has %3 pending free entries waiting\n", pthread_self(), name(), pending.read_space()));
        while (pending.read (&ptr, 1) == 1) {
+               DEBUG_TRACE (DEBUG::Pool, string_compose ("%1 %2 pushes back a pending free list entry before allocating\n", pthread_self(), name()));
                free_list.write (&ptr, 1);
        }
        return Pool::alloc ();