AutoDeleter: Add assertion in SetTo that the object is not the one already set.

Otherwise we could cause leaks.

Most of the time this check should be optimized out,
as most uses of AutoDeleter don't invoke SetTo. But
it would have caught some bugs in the VFS refactors
(which wound up being cancelled out by later commits
anyway, but this would've exposed them.)

Just invoke debugger(), which calls the kernel
debugger when compiled in kernel mode. And define
debugger() inline in this header if OS.h is not
included to avoid namespace pollution.

AutoDeleter: introduce MethodObjectDeleter

It allows to call destructor function stored in struct object such as
device_manager_info::put_node.

Change-Id: If9162f2f449d2b1c52c39509fa8732f21debf04a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3484
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>

AutoDeleter: add IsSet method

Change-Id: I70eb43a288ec9c02471aa21ce5618f0fa2399bd7
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3486
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

AutoDeleter: introduce HandleDeleter

It allow to use arbitrary handle type, null value and destructor function.

Change-Id: I87c444cb7ef1b08d1dbed7fe4171700171d651d2
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2977
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Reviewed-by: Axel Dörfler <axeld@pinc-software.de>

AutoDeleter: fix AutoDeleter size

C++ don't allow zero size class fields. If field with empty class field
is used, it's size will be 1 byte.

Create DeleteFunc instance as local variable at each use instead.

Fixes #16638.

Change-Id: Ifb76c45ea02e9fed014751542ee5f16f41e11d15
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3458
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

AutoDeleter: move destructor function in MethodDeleter from constructor to template argument

The same as CObjectDeleter.

Change-Id: I85c4cb3635f01f13e529ca087324cc2fcb42cfc0
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3456
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

AutoDeleter: move destructor function in CObjectDeleter from constructor to template argument

It allows to make typedef of pointer types and declaring pointers in headers.

Store of destructor function pointer in CObjectDeleter is no longer needed.

Change-Id: Ic629fd10b28b09f4190edf8ba6b911ca3108ab0e
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3455
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

AutoDeleter: add operator [] for ArrayDeleter

Change-Id: I015951053050b58e73fd71e4abb104a0755416f7
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2890
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Reviewed-by: Axel Dörfler <axeld@pinc-software.de>

AutoDeleter: do not allow copy

Change-Id: Ieab0fea46fc23c446bbaca407e3e80a4a7901896
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2704
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

AutoDeleter: add Get method for FileDescriptorCloser

This allows to use FileDescriptorCloser as unique pointer for file descriptor.

Change-Id: I4c768fafba6ed35658b2fdb075b9b547f53bc8da
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2495
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>

Explicitly denote BPrivate to avoid clashes

Improve FileDescriptorCloser

* Add SetTo()/Unset() methods and no-argument constructor.
* Detach() returns the FD now.

Improve FileDescriptorCloser

* Add SetTo()/Unset() methods and no-argument constructor.
* Detach() returns the FD now.

* Renamed DescriptorCloser to FileDescriptorCloser as suggested by Ingo.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37995 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added DescriptorCloser helper class.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37986 a95241bf-73f2-0310-859d-f6bbb57e9c96

* added operator-> for convenience

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37825 a95241bf-73f2-0310-859d-f6bbb57e9c96

AutoDeleter calls the destructor operator also when the object is NULL,
so we need to check for that explicitly in the CObjectDeleter and
MethodDeleter cases.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26673 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added MethodDeleter class, which calls a specified method on the object
when destroyed.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25067 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added CObjectDeleter class, which invokes a given destructor function.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24963 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Moved Referenceable.cpp to src/kits/support (private libbe API), and its header to
private/shared.
* Made AddReference() and CountReferences() inlines.
* The registrar is now using the private Referenceable version in libbe.so.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21767 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added AutoDeleter::Get().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21582 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Prevent double deletion when setting to an object that is already set.
* Added Unset() and Delete() methods.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11680 a95241bf-73f2-0310-859d-f6bbb57e9c96

Classes for scope-based auto deletion.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4838 a95241bf-73f2-0310-859d-f6bbb57e9c96

Explicitly denote BPrivate to avoid clashes

Improve FileDescriptorCloser

* Add SetTo()/Unset() methods and no-argument constructor.
* Detach() returns the FD now.

Improve FileDescriptorCloser

* Add SetTo()/Unset() methods and no-argument constructor.
* Detach() returns the FD now.

* Renamed DescriptorCloser to FileDescriptorCloser as suggested by Ingo.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37995 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added DescriptorCloser helper class.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37986 a95241bf-73f2-0310-859d-f6bbb57e9c96

* added operator-> for convenience

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37825 a95241bf-73f2-0310-859d-f6bbb57e9c96

AutoDeleter calls the destructor operator also when the object is NULL,
so we need to check for that explicitly in the CObjectDeleter and
MethodDeleter cases.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26673 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added MethodDeleter class, which calls a specified method on the object
when destroyed.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25067 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added CObjectDeleter class, which invokes a given destructor function.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24963 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Moved Referenceable.cpp to src/kits/support (private libbe API), and its header to
private/shared.
* Made AddReference() and CountReferences() inlines.
* The registrar is now using the private Referenceable version in libbe.so.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21767 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added AutoDeleter::Get().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21582 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Prevent double deletion when setting to an object that is already set.
* Added Unset() and Delete() methods.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11680 a95241bf-73f2-0310-859d-f6bbb57e9c96

Classes for scope-based auto deletion.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4838 a95241bf-73f2-0310-859d-f6bbb57e9c96