This class gobbles up handles. More...
#include <Handle_Gobbler.h>
Public Member Functions | |
~ACE_Handle_Gobbler (void) | |
Destructor. Cleans up any remaining handles. | |
int | consume_handles (size_t n_handles_to_keep_available) |
int | free_handles (size_t n_handles) |
Free up n_handles. | |
void | close_remaining_handles (void) |
All remaining handles are closed. | |
Private Types | |
typedef ACE_Handle_Set | HANDLE_SET |
Private Attributes | |
HANDLE_SET | handle_set_ |
The container which holds the open descriptors. |
This class gobbles up handles.
This is useful when we need to control the number of handles available for a process. This class is mostly used for testing purposes.
Definition at line 36 of file Handle_Gobbler.h.
typedef ACE_Handle_Set ACE_Handle_Gobbler::HANDLE_SET [private] |
Definition at line 57 of file Handle_Gobbler.h.
ACE_Handle_Gobbler::~ACE_Handle_Gobbler | ( | void | ) | [inline] |
Destructor. Cleans up any remaining handles.
Definition at line 24 of file Handle_Gobbler.inl.
{ this->close_remaining_handles (); }
void ACE_Handle_Gobbler::close_remaining_handles | ( | void | ) | [inline] |
All remaining handles are closed.
Definition at line 16 of file Handle_Gobbler.inl.
{ ACE_Handle_Set_Iterator iter (this->handle_set_); for (ACE_HANDLE h = iter (); h != ACE_INVALID_HANDLE; h = iter ()) ACE_OS::close (h); }
int ACE_Handle_Gobbler::consume_handles | ( | size_t | n_handles_to_keep_available | ) | [inline] |
Handles are opened continously until the process runs out of them, and then <n_handles_to_keep_available> handles are closed (freed) thereby making them usable in the future.
Definition at line 42 of file Handle_Gobbler.inl.
{ int result = 0; #if defined(ACE_WIN32) // On Win32, this style of gobbling doesn't seem to work. ACE_UNUSED_ARG(n_handles_to_keep_available); #else while (1) { ACE_HANDLE handle = ACE_OS::open (ACE_DEV_NULL, O_WRONLY); if (handle == ACE_INVALID_HANDLE) { if (ACE::out_of_handles (errno)) { result = this->free_handles (n_handles_to_keep_available); break; } else { result = -1; break; } } if (handle >= static_cast<ACE_HANDLE>(FD_SETSIZE)) break; this->handle_set_.set_bit (handle); } #endif /* ACE_WIN32 */ return result; }
int ACE_Handle_Gobbler::free_handles | ( | size_t | n_handles | ) | [inline] |
Free up n_handles.
Definition at line 30 of file Handle_Gobbler.inl.
{ ACE_Handle_Set_Iterator iter (this->handle_set_); for (ACE_HANDLE h = iter (); h != ACE_INVALID_HANDLE && n_handles > 0; --n_handles, h = iter ()) ACE_OS::close (h); return 0; }
HANDLE_SET ACE_Handle_Gobbler::handle_set_ [private] |
The container which holds the open descriptors.
Definition at line 60 of file Handle_Gobbler.h.