#include <DLL_Manager.h>
Public Types | |
enum | { DEFAULT_SIZE = ACE_DEFAULT_DLL_MANAGER_SIZE } |
Public Member Functions | |
ACE_DLL_Handle * | open_dll (const ACE_TCHAR *dll_name, int openmode, ACE_SHLIB_HANDLE handle) |
int | close_dll (const ACE_TCHAR *dll_name) |
Close the underlying dll. Decrements the refcount. | |
u_long | unload_policy (void) const |
Returns the current per-process UNLOAD_POLICY. | |
void | unload_policy (u_long unload_policy) |
Static Public Member Functions | |
static ACE_DLL_Manager * | instance (int size=ACE_DLL_Manager::DEFAULT_SIZE) |
Return a unique instance. | |
Protected Member Functions | |
ACE_DLL_Manager (int size=ACE_DLL_Manager::DEFAULT_SIZE) | |
Default constructor. | |
~ACE_DLL_Manager (void) | |
Destructor. | |
int | open (int size) |
int | close (void) |
ACE_DLL_Handle * | find_dll (const ACE_TCHAR *dll_name) const |
int | unload_dll (ACE_DLL_Handle *dll_handle, int force_unload=0) |
Private Member Functions | |
ACE_DLL_Manager (const ACE_DLL_Manager &) | |
void | operator= (const ACE_DLL_Manager &) |
Static Private Member Functions | |
static void | close_singleton (void) |
Close the singleton instance. | |
Private Attributes | |
ACE_DLL_Handle ** | handle_vector_ |
Vector containing all loaded handle objects. | |
int | current_size_ |
Current number of handles. | |
int | total_size_ |
Maximum number of handles. | |
u_long | unload_policy_ |
Unload strategy. | |
Static Private Attributes | |
static ACE_DLL_Manager * | instance_ = 0 |
Pointer to a process-wide ACE_DLL_Manager. | |
Friends | |
class | ACE_Framework_Repository |
class | ACE_Object_Manager |
This class is a singleton whose lifetime is managed by the ACE_Framework_Repository. Although it is normally meant to be used directly only by ACE_DLL, applications can call the unload_policy() methods in order get/set the the dll unload policy. Unload policies include per_process/per-dll and eager/lazy. Dlls can export set their own policy by using the ACE_DLL_UNLOAD_POLICY macro found in config-all.h. If a dll choses to set an unload policy, it will be used when the per-dll policy (the default) is in effect. If the per-dll policy is in effect and a dll has not chosen to set a policy, the current per-process policy will be used.
The following policy macros are provided in config-all.h:
ACE_DLL_UNLOAD_POLICY_PER_PROCESS - Per-process policy that unloads dlls eagerly.
ACE_DLL_UNLOAD_POLICY_PER_DLL - Apply policy on a per-dll basis. If the dll doesn't use one of the macros below, the current per-process policy will be used.
ACE_DLL_UNLOAD_POLICY_LAZY - Don't unload dll when refcount reaches zero, i.e., wait for either an explicit unload request or program exit.
ACE_DLL_UNLOAD_POLICY_DEFAULT - Default policy allows dlls to control their own destinies, but will unload those that don't make a choice eagerly.
ACE_DLL_Manager::ACE_DLL_Manager | ( | int | size = ACE_DLL_Manager::DEFAULT_SIZE |
) | [protected] |
Default constructor.
ACE_DLL_Manager::~ACE_DLL_Manager | ( | void | ) | [protected] |
Destructor.
ACE_DLL_Manager::ACE_DLL_Manager | ( | const ACE_DLL_Manager & | ) | [private] |
ACE_DLL_Manager * ACE_DLL_Manager::instance | ( | int | size = ACE_DLL_Manager::DEFAULT_SIZE |
) | [static] |
Return a unique instance.
ACE_DLL_Handle * ACE_DLL_Manager::open_dll | ( | const ACE_TCHAR * | dll_name, | |
int | openmode, | |||
ACE_SHLIB_HANDLE | handle | |||
) |
Factory for ACE_DLL_Handle objects. If one already exits, its refcount is incremented.
int ACE_DLL_Manager::close_dll | ( | const ACE_TCHAR * | dll_name | ) |
Close the underlying dll. Decrements the refcount.
u_long ACE_DLL_Manager::unload_policy | ( | void | ) | const |
Returns the current per-process UNLOAD_POLICY.
void ACE_DLL_Manager::unload_policy | ( | u_long | unload_policy | ) |
Set the per-process UNLOAD_POLICY. If the policy is changed from LAZY to EAGER, then it will also unload any dlls with zero refcounts.
int ACE_DLL_Manager::open | ( | int | size | ) | [protected] |
int ACE_DLL_Manager::close | ( | void | ) | [protected] |
ACE_DLL_Handle * ACE_DLL_Manager::find_dll | ( | const ACE_TCHAR * | dll_name | ) | const [protected] |
int ACE_DLL_Manager::unload_dll | ( | ACE_DLL_Handle * | dll_handle, | |
int | force_unload = 0 | |||
) | [protected] |
void ACE_DLL_Manager::close_singleton | ( | void | ) | [static, private] |
Close the singleton instance.
void ACE_DLL_Manager::operator= | ( | const ACE_DLL_Manager & | ) | [private] |
friend class ACE_Framework_Repository [friend] |
friend class ACE_Object_Manager [friend] |
ACE_DLL_Handle** ACE_DLL_Manager::handle_vector_ [private] |
Vector containing all loaded handle objects.
int ACE_DLL_Manager::current_size_ [private] |
Current number of handles.
int ACE_DLL_Manager::total_size_ [private] |
Maximum number of handles.
u_long ACE_DLL_Manager::unload_policy_ [private] |
Unload strategy.
ACE_DLL_Manager * ACE_DLL_Manager::instance_ = 0 [static, private] |
Pointer to a process-wide ACE_DLL_Manager.