[PATCH 02/12] libcamera: signal: Replace object.h inclusion with forward declatation

[Milan Zamazal]

Laurent Pinchart <laurent.pinchart at ideasonboard.com> writes:

> 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. To can speed up compilation a little bit, but more
              ^^^^^^
It can?


> 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 at ideasonboard.com>

Reviewed-by: Milan Zamazal <mzamazal at redhat.com>

> ---
>  include/libcamera/base/signal.h                                | 3 ++-
>  src/libcamera/base/bound_method.cpp                            | 1 +
>  src/libcamera/base/signal.cpp                                  | 1 +
>  src/libcamera/base/thread.cpp                                  | 1 +
>  test/event-thread.cpp                                          | 1 +
>  test/ipa/ipa_interface_test.cpp                                | 1 +
>  test/message.cpp                                               | 1 +
>  test/signal-threads.cpp                                        | 1 +
>  test/timer-thread.cpp                                          | 1 +
>  .../ipc/generators/libcamera_templates/module_ipa_proxy.h.tmpl | 1 +
>  10 files changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/include/libcamera/base/signal.h b/include/libcamera/base/signal.h
> index 841e4b4ca15c..444997b4525d 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 3ecec51c4b75..c83d623f107d 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 a46386a05abf..de51d060c21a 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 b96951ac19ba..75693c92a0b1 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 ef8a52c3de55..88a8c07ef9f0 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 051ef96e7ed2..56f3cd6d57ba 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 d148a13d6c7a..0e76f323e3b9 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 d5e2eb662df2..8c550eb014d8 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 618217538779..0bcd0d8ce194 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 ed270f5cd49c..6e823598930e 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"