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-rw-r--r--include/libcamera/bound_method.h131
-rw-r--r--include/libcamera/meson.build1
-rw-r--r--include/libcamera/object.h5
-rw-r--r--include/libcamera/signal.h145
4 files changed, 151 insertions, 131 deletions
diff --git a/include/libcamera/bound_method.h b/include/libcamera/bound_method.h
new file mode 100644
index 00000000..38c44b92
--- /dev/null
+++ b/include/libcamera/bound_method.h
@@ -0,0 +1,131 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * bound_method.h - Method bind and invocation
+ */
+#ifndef __LIBCAMERA_BOUND_METHOD_H__
+#define __LIBCAMERA_BOUND_METHOD_H__
+
+#include <tuple>
+#include <type_traits>
+
+namespace libcamera {
+
+class Object;
+template<typename... Args>
+class Signal;
+class SignalBase;
+
+class BoundMethodBase
+{
+public:
+ BoundMethodBase(void *obj, Object *object)
+ : obj_(obj), object_(object) {}
+ virtual ~BoundMethodBase() {}
+
+ template<typename T, typename std::enable_if<!std::is_same<Object, T>::value>::type * = nullptr>
+ bool match(T *obj) { return obj == obj_; }
+ bool match(Object *object) { return object == object_; }
+
+ void disconnect(SignalBase *signal);
+
+ void activatePack(void *pack);
+ virtual void invokePack(void *pack) = 0;
+
+protected:
+ void *obj_;
+ Object *object_;
+};
+
+template<typename... Args>
+class BoundMethodArgs : public BoundMethodBase
+{
+private:
+#ifndef __DOXYGEN__
+ /*
+ * This is a cheap partial implementation of std::integer_sequence<>
+ * from C++14.
+ */
+ template<int...>
+ struct sequence {
+ };
+
+ template<int N, int... S>
+ struct generator : generator<N-1, N-1, S...> {
+ };
+
+ template<int... S>
+ struct generator<0, S...> {
+ typedef sequence<S...> type;
+ };
+#endif
+
+ using PackType = std::tuple<typename std::remove_reference<Args>::type...>;
+
+ template<int... S>
+ void invokePack(void *pack, sequence<S...>)
+ {
+ PackType *args = static_cast<PackType *>(pack);
+ invoke(std::get<S>(*args)...);
+ delete args;
+ }
+
+public:
+ BoundMethodArgs(void *obj, Object *object)
+ : BoundMethodBase(obj, object) {}
+
+ void invokePack(void *pack) override
+ {
+ invokePack(pack, typename generator<sizeof...(Args)>::type());
+ }
+
+ virtual void activate(Args... args) = 0;
+ virtual void invoke(Args... args) = 0;
+};
+
+template<typename T, typename... Args>
+class BoundMemberMethod : public BoundMethodArgs<Args...>
+{
+public:
+ using PackType = std::tuple<typename std::remove_reference<Args>::type...>;
+
+ BoundMemberMethod(T *obj, Object *object, void (T::*func)(Args...))
+ : BoundMethodArgs<Args...>(obj, object), func_(func) {}
+
+ void activate(Args... args)
+ {
+ if (this->object_)
+ BoundMethodBase::activatePack(new PackType{ args... });
+ else
+ (static_cast<T *>(this->obj_)->*func_)(args...);
+ }
+
+ void invoke(Args... args)
+ {
+ (static_cast<T *>(this->obj_)->*func_)(args...);
+ }
+
+private:
+ friend class Signal<Args...>;
+ void (T::*func_)(Args...);
+};
+
+template<typename... Args>
+class BoundStaticMethod : public BoundMethodArgs<Args...>
+{
+public:
+ BoundStaticMethod(void (*func)(Args...))
+ : BoundMethodArgs<Args...>(nullptr, nullptr), func_(func) {}
+
+ void activate(Args... args) { (*func_)(args...); }
+ void invoke(Args... args) {}
+
+private:
+ friend class Signal<Args...>;
+ void (*func_)(Args...);
+};
+
+}; /* namespace libcamera */
+
+#endif /* __LIBCAMERA_BOUND_METHOD_H__ */
diff --git a/include/libcamera/meson.build b/include/libcamera/meson.build
index 920eb5fc..a8a38a9b 100644
--- a/include/libcamera/meson.build
+++ b/include/libcamera/meson.build
@@ -1,4 +1,5 @@
libcamera_api = files([
+ 'bound_method.h',
'buffer.h',
'camera.h',
'camera_manager.h',
diff --git a/include/libcamera/object.h b/include/libcamera/object.h
index 3d08d69a..e3b39cf5 100644
--- a/include/libcamera/object.h
+++ b/include/libcamera/object.h
@@ -10,13 +10,14 @@
#include <list>
#include <memory>
+#include <libcamera/bound_method.h>
+
namespace libcamera {
class Message;
template<typename... Args>
class Signal;
class SignalBase;
-class SlotBase;
class Thread;
class Object
@@ -36,7 +37,7 @@ protected:
private:
template<typename... Args>
friend class Signal;
- friend class SlotBase;
+ friend class BoundMethodBase;
friend class Thread;
void connect(SignalBase *signal);
diff --git a/include/libcamera/signal.h b/include/libcamera/signal.h
index 8f6db700..3b6de30f 100644
--- a/include/libcamera/signal.h
+++ b/include/libcamera/signal.h
@@ -8,127 +8,14 @@
#define __LIBCAMERA_SIGNAL_H__
#include <list>
-#include <tuple>
#include <type_traits>
#include <vector>
+#include <libcamera/bound_method.h>
#include <libcamera/object.h>
namespace libcamera {
-template<typename... Args>
-class Signal;
-class SignalBase;
-
-class SlotBase
-{
-public:
- SlotBase(void *obj, Object *object)
- : obj_(obj), object_(object) {}
- virtual ~SlotBase() {}
-
- template<typename T, typename std::enable_if<!std::is_same<Object, T>::value>::type * = nullptr>
- bool match(T *obj) { return obj == obj_; }
- bool match(Object *object) { return object == object_; }
-
- void disconnect(SignalBase *signal);
-
- void activatePack(void *pack);
- virtual void invokePack(void *pack) = 0;
-
-protected:
- void *obj_;
- Object *object_;
-};
-
-template<typename... Args>
-class SlotArgs : public SlotBase
-{
-private:
-#ifndef __DOXYGEN__
- /*
- * This is a cheap partial implementation of std::integer_sequence<>
- * from C++14.
- */
- template<int...>
- struct sequence {
- };
-
- template<int N, int... S>
- struct generator : generator<N-1, N-1, S...> {
- };
-
- template<int... S>
- struct generator<0, S...> {
- typedef sequence<S...> type;
- };
-#endif
-
- using PackType = std::tuple<typename std::remove_reference<Args>::type...>;
-
- template<int... S>
- void invokePack(void *pack, sequence<S...>)
- {
- PackType *args = static_cast<PackType *>(pack);
- invoke(std::get<S>(*args)...);
- delete args;
- }
-
-public:
- SlotArgs(void *obj, Object *object)
- : SlotBase(obj, object) {}
-
- void invokePack(void *pack) override
- {
- invokePack(pack, typename generator<sizeof...(Args)>::type());
- }
-
- virtual void activate(Args... args) = 0;
- virtual void invoke(Args... args) = 0;
-};
-
-template<typename T, typename... Args>
-class SlotMember : public SlotArgs<Args...>
-{
-public:
- using PackType = std::tuple<typename std::remove_reference<Args>::type...>;
-
- SlotMember(T *obj, Object *object, void (T::*func)(Args...))
- : SlotArgs<Args...>(obj, object), func_(func) {}
-
- void activate(Args... args)
- {
- if (this->object_)
- SlotBase::activatePack(new PackType{ args... });
- else
- (static_cast<T *>(this->obj_)->*func_)(args...);
- }
-
- void invoke(Args... args)
- {
- (static_cast<T *>(this->obj_)->*func_)(args...);
- }
-
-private:
- friend class Signal<Args...>;
- void (T::*func_)(Args...);
-};
-
-template<typename... Args>
-class SlotStatic : public SlotArgs<Args...>
-{
-public:
- SlotStatic(void (*func)(Args...))
- : SlotArgs<Args...>(nullptr, nullptr), func_(func) {}
-
- void activate(Args... args) { (*func_)(args...); }
- void invoke(Args... args) {}
-
-private:
- friend class Signal<Args...>;
- void (*func_)(Args...);
-};
-
class SignalBase
{
public:
@@ -136,7 +23,7 @@ public:
void disconnect(T *obj)
{
for (auto iter = slots_.begin(); iter != slots_.end(); ) {
- SlotBase *slot = *iter;
+ BoundMethodBase *slot = *iter;
if (slot->match(obj)) {
iter = slots_.erase(iter);
delete slot;
@@ -148,7 +35,7 @@ public:
protected:
friend class Object;
- std::list<SlotBase *> slots_;
+ std::list<BoundMethodBase *> slots_;
};
template<typename... Args>
@@ -158,7 +45,7 @@ public:
Signal() {}
~Signal()
{
- for (SlotBase *slot : slots_) {
+ for (BoundMethodBase *slot : slots_) {
slot->disconnect(this);
delete slot;
}
@@ -170,7 +57,7 @@ public:
{
Object *object = static_cast<Object *>(obj);
object->connect(this);
- slots_.push_back(new SlotMember<T, Args...>(obj, object, func));
+ slots_.push_back(new BoundMemberMethod<T, Args...>(obj, object, func));
}
template<typename T, typename std::enable_if<!std::is_base_of<Object, T>::value>::type * = nullptr>
@@ -179,17 +66,17 @@ public:
#endif
void connect(T *obj, void (T::*func)(Args...))
{
- slots_.push_back(new SlotMember<T, Args...>(obj, nullptr, func));
+ slots_.push_back(new BoundMemberMethod<T, Args...>(obj, nullptr, func));
}
void connect(void (*func)(Args...))
{
- slots_.push_back(new SlotStatic<Args...>(func));
+ slots_.push_back(new BoundStaticMethod<Args...>(func));
}
void disconnect()
{
- for (SlotBase *slot : slots_)
+ for (BoundMethodBase *slot : slots_)
delete slot;
slots_.clear();
}
@@ -204,15 +91,15 @@ public:
void disconnect(T *obj, void (T::*func)(Args...))
{
for (auto iter = slots_.begin(); iter != slots_.end(); ) {
- SlotArgs<Args...> *slot = static_cast<SlotArgs<Args...> *>(*iter);
+ BoundMethodArgs<Args...> *slot = static_cast<BoundMethodArgs<Args...> *>(*iter);
/*
* If the object matches the slot, the slot is
* guaranteed to be a member slot, so we can safely
- * cast it to SlotMember<T, Args...> and access its
+ * cast it to BoundMemberMethod<T, Args...> and access its
* func_ member.
*/
if (slot->match(obj) &&
- static_cast<SlotMember<T, Args...> *>(slot)->func_ == func) {
+ static_cast<BoundMemberMethod<T, Args...> *>(slot)->func_ == func) {
iter = slots_.erase(iter);
delete slot;
} else {
@@ -224,9 +111,9 @@ public:
void disconnect(void (*func)(Args...))
{
for (auto iter = slots_.begin(); iter != slots_.end(); ) {
- SlotArgs<Args...> *slot = *iter;
+ BoundMethodArgs<Args...> *slot = *iter;
if (slot->match(nullptr) &&
- static_cast<SlotStatic<Args...> *>(slot)->func_ == func) {
+ static_cast<BoundStaticMethod<Args...> *>(slot)->func_ == func) {
iter = slots_.erase(iter);
delete slot;
} else {
@@ -241,9 +128,9 @@ public:
* Make a copy of the slots list as the slot could call the
* disconnect operation, invalidating the iterator.
*/
- std::vector<SlotBase *> slots{ slots_.begin(), slots_.end() };
- for (SlotBase *slot : slots)
- static_cast<SlotArgs<Args...> *>(slot)->activate(args...);
+ std::vector<BoundMethodBase *> slots{ slots_.begin(), slots_.end() };
+ for (BoundMethodBase *slot : slots)
+ static_cast<BoundMethodArgs<Args...> *>(slot)->activate(args...);
}
};
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-28 11:30:50 +0000