diff options
| author | Avi Kivity <avi@redhat.com> | 2012-10-02 16:39:57 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-10-15 11:43:06 +0200 |
| commit | 975aefe011197453284a4ab777000183e6096d5b (patch) | |
| tree | 708fae89a29e58c1d58380f2b4ee82bab5350d01 /memory.c | |
| parent | 0d673e36a74d366ce090ab096955317b581c0fb0 (diff) | |
memory: provide defaults for MemoryListener operations
Many listeners don't need to respond to all MemoryListener callbacks;
provide suitable no-op defaults instead.
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'memory.c')
| -rw-r--r-- | memory.c | 23 |
1 files changed, 17 insertions, 6 deletions
@@ -99,13 +99,17 @@ static bool memory_listener_match(MemoryListener *listener, switch (_direction) { \ case Forward: \ QTAILQ_FOREACH(_listener, &memory_listeners, link) { \ - _listener->_callback(_listener, ##_args); \ + if (_listener->_callback) { \ + _listener->_callback(_listener, ##_args); \ + } \ } \ break; \ case Reverse: \ QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \ memory_listeners, link) { \ - _listener->_callback(_listener, ##_args); \ + if (_listener->_callback) { \ + _listener->_callback(_listener, ##_args); \ + } \ } \ break; \ default: \ @@ -120,7 +124,8 @@ static bool memory_listener_match(MemoryListener *listener, switch (_direction) { \ case Forward: \ QTAILQ_FOREACH(_listener, &memory_listeners, link) { \ - if (memory_listener_match(_listener, _section)) { \ + if (_listener->_callback \ + && memory_listener_match(_listener, _section)) { \ _listener->_callback(_listener, _section, ##_args); \ } \ } \ @@ -128,7 +133,8 @@ static bool memory_listener_match(MemoryListener *listener, case Reverse: \ QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \ memory_listeners, link) { \ - if (memory_listener_match(_listener, _section)) { \ + if (_listener->_callback \ + && memory_listener_match(_listener, _section)) { \ _listener->_callback(_listener, _section, ##_args); \ } \ } \ @@ -1470,8 +1476,11 @@ static void listener_add_address_space(MemoryListener *listener, } if (global_dirty_log) { - listener->log_global_start(listener); + if (listener->log_global_start) { + listener->log_global_start(listener); + } } + FOR_EACH_FLAT_RANGE(fr, as->current_map) { MemoryRegionSection section = { .mr = fr->mr, @@ -1481,7 +1490,9 @@ static void listener_add_address_space(MemoryListener *listener, .offset_within_address_space = int128_get64(fr->addr.start), .readonly = fr->readonly, }; - listener->region_add(listener, §ion); + if (listener->region_add) { + listener->region_add(listener, §ion); + } } } |