libcamera: signal: Replace object.h inclusion with forward declatation

The signal.h header doesn't need to include object.h. Replace it with a
forward declaration, and instead include object.h in source files that
require it. It can speed up compilation a little bit, but more
importantly avoids unintended dependencies from the Signal class to the
Object class to be added later as the compiler will catch them.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>

10 files changed, 11 insertions, 1 deletions

diff --git a/include/libcamera/base/signal.h b/include/libcamera/base/signal.h
index 841e4b4c..444997b4 100644
--- a/include/libcamera/base/signal.h
+++ b/include/libcamera/base/signal.h
@@ -13,10 +13,11 @@
 #include <vector>
 
 #include <libcamera/base/bound_method.h>
-#include <libcamera/base/object.h>
 
 namespace libcamera {
 
+class Object;
+
 class SignalBase
 {
 public:
diff --git a/src/libcamera/base/bound_method.cpp b/src/libcamera/base/bound_method.cpp
index 3ecec51c..c83d623f 100644
--- a/src/libcamera/base/bound_method.cpp
+++ b/src/libcamera/base/bound_method.cpp
@@ -7,6 +7,7 @@
 
 #include <libcamera/base/bound_method.h>
 #include <libcamera/base/message.h>
+#include <libcamera/base/object.h>
 #include <libcamera/base/semaphore.h>
 #include <libcamera/base/thread.h>
 
diff --git a/src/libcamera/base/signal.cpp b/src/libcamera/base/signal.cpp
index 02290ad7..f1018b37 100644
--- a/src/libcamera/base/signal.cpp
+++ b/src/libcamera/base/signal.cpp
@@ -8,6 +8,7 @@
 #include <libcamera/base/signal.h>
 
 #include <libcamera/base/mutex.h>
+#include <libcamera/base/object.h>
 
 /**
  * \file base/signal.h
diff --git a/src/libcamera/base/thread.cpp b/src/libcamera/base/thread.cpp
index b96951ac..75693c92 100644
--- a/src/libcamera/base/thread.cpp
+++ b/src/libcamera/base/thread.cpp
@@ -18,6 +18,7 @@
 #include <libcamera/base/log.h>
 #include <libcamera/base/message.h>
 #include <libcamera/base/mutex.h>
+#include <libcamera/base/object.h>
 
 /**
  * \page thread Thread Support
diff --git a/test/event-thread.cpp b/test/event-thread.cpp
index ef8a52c3..88a8c07e 100644
--- a/test/event-thread.cpp
+++ b/test/event-thread.cpp
@@ -11,6 +11,7 @@
 #include <unistd.h>
 
 #include <libcamera/base/event_notifier.h>
+#include <libcamera/base/object.h>
 #include <libcamera/base/thread.h>
 #include <libcamera/base/timer.h>
 
diff --git a/test/ipa/ipa_interface_test.cpp b/test/ipa/ipa_interface_test.cpp
index 051ef96e..56f3cd6d 100644
--- a/test/ipa/ipa_interface_test.cpp
+++ b/test/ipa/ipa_interface_test.cpp
@@ -16,6 +16,7 @@
 
 #include <libcamera/base/event_dispatcher.h>
 #include <libcamera/base/event_notifier.h>
+#include <libcamera/base/object.h>
 #include <libcamera/base/thread.h>
 #include <libcamera/base/timer.h>
 
diff --git a/test/message.cpp b/test/message.cpp
index d148a13d..0e76f323 100644
--- a/test/message.cpp
+++ b/test/message.cpp
@@ -11,6 +11,7 @@
 #include <thread>
 
 #include <libcamera/base/message.h>
+#include <libcamera/base/object.h>
 #include <libcamera/base/thread.h>
 
 #include "test.h"
diff --git a/test/signal-threads.cpp b/test/signal-threads.cpp
index d5e2eb66..8c550eb0 100644
--- a/test/signal-threads.cpp
+++ b/test/signal-threads.cpp
@@ -10,6 +10,7 @@
 #include <thread>
 
 #include <libcamera/base/message.h>
+#include <libcamera/base/object.h>
 #include <libcamera/base/thread.h>
 #include <libcamera/base/utils.h>
 
diff --git a/test/timer-thread.cpp b/test/timer-thread.cpp
index 61821753..0bcd0d8c 100644
--- a/test/timer-thread.cpp
+++ b/test/timer-thread.cpp
@@ -9,6 +9,7 @@
 #include <iostream>
 
 #include <libcamera/base/event_dispatcher.h>
+#include <libcamera/base/object.h>
 #include <libcamera/base/thread.h>
 #include <libcamera/base/timer.h>
 
diff --git a/utils/ipc/generators/libcamera_templates/module_ipa_proxy.h.tmpl b/utils/ipc/generators/libcamera_templates/module_ipa_proxy.h.tmpl
index ed270f5c..6e823598 100644
--- a/utils/ipc/generators/libcamera_templates/module_ipa_proxy.h.tmpl
+++ b/utils/ipc/generators/libcamera_templates/module_ipa_proxy.h.tmpl
@@ -18,6 +18,7 @@
 #include <libcamera/ipa/ipa_interface.h>
 #include <libcamera/ipa/{{module_name}}_ipa_interface.h>
 
+#include <libcamera/base/object.h>
 #include <libcamera/base/thread.h>
 
 #include "libcamera/internal/control_serializer.h"