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ACE_NT_Service Class Reference

Provide the base class which defines the interface for controlling an NT service. More...

#include <NT_Service.h>

Inheritance diagram for ACE_NT_Service:
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Collaboration diagram for ACE_NT_Service:
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Public Member Functions

 ACE_NT_Service (DWORD start_timeout=ACE_NT_SERVICE_START_TIMEOUT, DWORD service_type=SERVICE_WIN32_OWN_PROCESS, DWORD controls_mask=SERVICE_ACCEPT_STOP)
 Constructor primarily for use when running the service. More...
 
 ACE_NT_Service (const ACE_TCHAR *name, const ACE_TCHAR *desc=0, DWORD start_timeout=ACE_NT_SERVICE_START_TIMEOUT, DWORD service_type=SERVICE_WIN32_OWN_PROCESS, DWORD controls_mask=SERVICE_ACCEPT_STOP)
 
virtual ~ACE_NT_Service (void)
 
virtual int open (void *args=0)
 
virtual int fini (void)
 
virtual int svc (void)
 
virtual void handle_control (DWORD control_code)
 
void svc_handle (const SERVICE_STATUS_HANDLE new_svc_handle)
 
void name (const ACE_TCHAR *name, const ACE_TCHAR *desc=0)
 
const ACE_TCHARname (void) const
 Get the service name. More...
 
const ACE_TCHARdesc (void) const
 Get the service description. More...
 
void host (const ACE_TCHAR *host)
 Sets the host machine. More...
 
const ACE_TCHARhost (void) const
 Get the host machine. More...
 
int insert (DWORD start_type=SERVICE_DEMAND_START, DWORD error_control=SERVICE_ERROR_IGNORE, const ACE_TCHAR *exe_path=0, const ACE_TCHAR *group_name=0, LPDWORD tag_id=0, const ACE_TCHAR *dependencies=0, const ACE_TCHAR *account_name=0, const ACE_TCHAR *password=0, DWORD desired_access=SERVICE_ALL_ACCESS)
 
int remove (void)
 
int startup (DWORD startup)
 Sets the startup type for the service. Returns -1 on error, 0 on success. More...
 
DWORD startup (void)
 Returns the current startup type. More...
 
void capture_log_msg_attributes (void)
 
void inherit_log_msg_attributes (void)
 
int start_svc (ACE_Time_Value *wait_time=0, DWORD *svc_state=0, DWORD argc=0, const ACE_TCHAR **argv=0)
 
int stop_svc (ACE_Time_Value *wait_time=0, DWORD *svc_state=0)
 
int pause_svc (ACE_Time_Value *wait_time=0, DWORD *svc_state=0)
 Pause the service. More...
 
int continue_svc (ACE_Time_Value *wait_time=0, DWORD *svc_state=0)
 Continue the service. More...
 
DWORD state (ACE_Time_Value *wait_hint=0)
 
int state (DWORD *pstate, ACE_Time_Value *wait_hint=0)
 
int test_access (DWORD desired_access=SERVICE_ALL_ACCESS)
 
- Public Member Functions inherited from ACE_Task< ACE_MT_SYNCH >
 ACE_Task (ACE_Thread_Manager *thr_mgr=0, ACE_Message_Queue< ACE_SYNCH_USE, ACE_System_Time_Policy > *mq=0)
 
virtual ~ACE_Task (void)
 Destructor. More...
 
ACE_Message_Queue
< ACE_SYNCH_USE,
ACE_System_Time_Policy > * 
msg_queue (void)
 Gets the message queue associated with this task. More...
 
void msg_queue (ACE_Message_Queue< ACE_SYNCH_USE, ACE_System_Time_Policy > *)
 Sets the message queue associated with this task. More...
 
ACE_Time_Value_T
< ACE_System_Time_Policy
gettimeofday (void) const
 
void set_time_policy (ACE_System_Time_Policyconst &time_policy)
 
int putq (ACE_Message_Block *, ACE_Time_Value *timeout=0)
 
int getq (ACE_Message_Block *&mb, ACE_Time_Value *timeout=0)
 
int ungetq (ACE_Message_Block *, ACE_Time_Value *timeout=0)
 
int reply (ACE_Message_Block *mb, ACE_Time_Value *tv=0)
 
int put_next (ACE_Message_Block *msg, ACE_Time_Value *timeout=0)
 
const ACE_TCHARname (void) const
 
ACE_Task< ACE_SYNCH_USE,
ACE_System_Time_Policy > * 
next (void)
 Get next Task pointer. More...
 
void next (ACE_Task< ACE_SYNCH_USE, ACE_System_Time_Policy > *)
 Set next Task pointer. More...
 
ACE_Task< ACE_SYNCH_USE,
ACE_System_Time_Policy > * 
sibling (void)
 
ACE_Module< ACE_SYNCH_USE,
ACE_System_Time_Policy > * 
module (void) const
 Return the Task's Module if there is one, else returns 0. More...
 
int flush (u_long flag=ACE_Task_Flags::ACE_FLUSHALL)
 
void water_marks (ACE_IO_Cntl_Msg::ACE_IO_Cntl_Cmds, size_t)
 Manipulate watermarks. More...
 
void dump (void) const
 Dump the state of an object. More...
 
- Public Member Functions inherited from ACE_Task_Base
 ACE_Task_Base (ACE_Thread_Manager *=0)
 Constructor. More...
 
virtual ~ACE_Task_Base (void)
 Destructor. More...
 
virtual int close (u_long flags=0)
 Default ACE_Task close routine. More...
 
virtual int module_closed (void)
 
virtual int put (ACE_Message_Block *, ACE_Time_Value *=0)
 Default ACE_Task put routine. More...
 
virtual int activate (long flags=THR_NEW_LWP|THR_JOINABLE|THR_INHERIT_SCHED, int n_threads=1, int force_active=0, long priority=ACE_DEFAULT_THREAD_PRIORITY, int grp_id=-1, ACE_Task_Base *task=0, ACE_hthread_t thread_handles[]=0, void *stack[]=0, size_t stack_size[]=0, ACE_thread_t thread_ids[]=0, const char *thr_name[]=0)
 
virtual int wait (void)
 Wait for all threads running in a task to exit. More...
 
virtual int suspend (void)
 Suspend a task. More...
 
virtual int resume (void)
 Resume a suspended task. More...
 
int grp_id (void) const
 Get the current group id. More...
 
void grp_id (int)
 Set the current group id. More...
 
ACE_Thread_Managerthr_mgr (void) const
 Get the thread manager associated with this Task. More...
 
void thr_mgr (ACE_Thread_Manager *)
 Set the thread manager associated with this Task. More...
 
int is_reader (void) const
 True if queue is a reader, else false. More...
 
int is_writer (void) const
 True if queue is a writer, else false. More...
 
size_t thr_count (void) const
 
ACE_thread_t last_thread (void) const
 
- Public Member Functions inherited from ACE_Service_Object
 ACE_Service_Object (ACE_Reactor *=0)
 Constructor. More...
 
virtual ~ACE_Service_Object (void)
 Destructor. More...
 
- Public Member Functions inherited from ACE_Event_Handler
virtual ~ACE_Event_Handler (void)
 Destructor is virtual to enable proper cleanup. More...
 
virtual ACE_HANDLE get_handle (void) const
 Get the I/O handle. More...
 
virtual void set_handle (ACE_HANDLE)
 Set the I/O handle. More...
 
virtual int priority (void) const
 
virtual void priority (int priority)
 Set the priority of the Event_Handler. More...
 
virtual int handle_input (ACE_HANDLE fd=ACE_INVALID_HANDLE)
 Called when input events occur (e.g., connection or data). More...
 
virtual int handle_output (ACE_HANDLE fd=ACE_INVALID_HANDLE)
 
virtual int handle_exception (ACE_HANDLE fd=ACE_INVALID_HANDLE)
 Called when an exceptional events occur (e.g., SIGURG). More...
 
virtual int handle_timeout (const ACE_Time_Value &current_time, const void *act=0)
 
virtual int handle_exit (ACE_Process *)
 Called when a process exits. More...
 
virtual int handle_close (ACE_HANDLE handle, ACE_Reactor_Mask close_mask)
 
virtual int handle_signal (int signum, siginfo_t *=0, ucontext_t *=0)
 
virtual int resume_handler (void)
 
virtual int handle_qos (ACE_HANDLE=ACE_INVALID_HANDLE)
 
virtual int handle_group_qos (ACE_HANDLE=ACE_INVALID_HANDLE)
 
virtual void reactor (ACE_Reactor *reactor)
 Set the event demultiplexors. More...
 
virtual ACE_Reactorreactor (void) const
 Get the event demultiplexors. More...
 
virtual
ACE_Reactor_Timer_Interface
reactor_timer_interface (void) const
 Get only the reactor's timer related interface. More...
 
virtual Reference_Count add_reference (void)
 Increment reference count on the handler. More...
 
virtual Reference_Count remove_reference (void)
 Decrement reference count on the handler. More...
 
Reference_Counting_Policyreference_counting_policy (void)
 Current Reference_Counting_Policy. More...
 
- Public Member Functions inherited from ACE_Shared_Object
 ACE_Shared_Object (void)
 Constructor. More...
 
virtual ~ACE_Shared_Object (void)
 Destructor. More...
 
virtual int init (int argc, ACE_TCHAR *argv[])
 Initializes object when dynamic linking occurs. More...
 
virtual int info (ACE_TCHAR **info_string, size_t length=0) const
 Returns information on a service object. More...
 

Public Attributes

 ACE_ALLOC_HOOK_DECLARE
 Declare the dynamic allocation hooks. More...
 
- Public Attributes inherited from ACE_Task< ACE_MT_SYNCH >
ACE_Message_Queue
< ACE_SYNCH_USE,
ACE_System_Time_Policy > * 
msg_queue_
 Queue of messages on the ACE_Task.. More...
 
bool delete_msg_queue_
 true if should delete Message_Queue, false otherwise. More...
 
ACE_Module< ACE_SYNCH_USE,
ACE_System_Time_Policy > * 
mod_
 Back-pointer to the enclosing module. More...
 
ACE_Task< ACE_SYNCH_USE,
ACE_System_Time_Policy > * 
next_
 Pointer to adjacent ACE_Task. More...
 
 ACE_ALLOC_HOOK_DECLARE
 Declare the dynamic allocation hooks. More...
 

Protected Member Functions

int report_status (DWORD new_status, DWORD time_hint=0)
 
SC_HANDLE svc_sc_handle (void)
 
void wait_for_service_state (DWORD desired_state, ACE_Time_Value *wait_time)
 
virtual void stop_requested (DWORD control_code)
 Called by <handle_control> when a stop/shutdown was requested. More...
 
virtual void pause_requested (DWORD control_code)
 Called by <handle_control> when a pause was requested. More...
 
virtual void continue_requested (DWORD control_code)
 Called by <handle_control> when a continue was requested. More...
 
virtual void interrogate_requested (DWORD control_code)
 Called by <handle_control> when a interrogate was requested. More...
 
- Protected Member Functions inherited from ACE_Event_Handler
 ACE_Event_Handler (ACE_Reactor *=0, int priority=ACE_Event_Handler::LO_PRIORITY)
 Force ACE_Event_Handler to be an abstract base class. More...
 

Protected Attributes

DWORD start_time_
 Estimate of init time needed. More...
 
SERVICE_STATUS_HANDLE svc_handle_
 Service handle - doesn't need close. More...
 
SERVICE_STATUS svc_status_
 
SC_HANDLE svc_sc_handle_
 Service's SCM handle. More...
 
ACE_TCHARname_
 
ACE_TCHARdesc_
 
ACE_TCHARhost_
 
ACE_OS_Log_Msg_Attributes log_msg_attributes_
 ACE_Log_Msg attributes to inherit from the starting thread. More...
 
- Protected Attributes inherited from ACE_Task_Base
size_t thr_count_
 
ACE_Thread_Managerthr_mgr_
 Multi-threading manager. More...
 
u_long flags_
 ACE_Task flags. More...
 
int grp_id_
 This maintains the group id of the Task. More...
 
ACE_thread_t last_thread_id_
 Holds the thread ID of the last thread to exit svc() in this object. More...
 
- Protected Attributes inherited from ACE_Event_Handler
Atomic_Reference_Count reference_count_
 Reference count. More...
 

Additional Inherited Members

- Public Types inherited from ACE_Event_Handler
enum  {
  LO_PRIORITY = 0, HI_PRIORITY = 10, NULL_MASK = 0, READ_MASK = (1 << 0),
  WRITE_MASK = (1 << 1), EXCEPT_MASK = (1 << 2), ACCEPT_MASK = (1 << 3), CONNECT_MASK = (1 << 4),
  TIMER_MASK = (1 << 5), QOS_MASK = (1 << 6), GROUP_QOS_MASK = (1 << 7), SIGNAL_MASK = (1 << 8),
  ALL_EVENTS_MASK, RWE_MASK, DONT_CALL = (1 << 9)
}
 
enum  { ACE_EVENT_HANDLER_NOT_RESUMED = -1, ACE_REACTOR_RESUMES_HANDLER = 0, ACE_APPLICATION_RESUMES_HANDLER }
 
typedef long Reference_Count
 Reference count type. More...
 
- Static Public Member Functions inherited from ACE_Task_Base
static ACE_THR_FUNC_RETURN svc_run (void *)
 Routine that runs the service routine as a daemon thread. More...
 
static void cleanup (void *object, void *params)
 
- Static Public Member Functions inherited from ACE_Event_Handler
static ACE_THR_FUNC_RETURN read_adapter (void *event_handler)
 
static int register_stdin_handler (ACE_Event_Handler *eh, ACE_Reactor *reactor, ACE_Thread_Manager *thr_mgr, int flags=THR_DETACHED)
 
static int remove_stdin_handler (ACE_Reactor *reactor, ACE_Thread_Manager *thr_mgr)
 Performs the inverse of the register_stdin_handler() method. More...
 
- Protected Types inherited from ACE_Event_Handler
typedef ACE_Atomic_Op
< ACE_SYNCH_MUTEX,
Reference_Count
Atomic_Reference_Count
 Typedef for implementation of reference counting. More...
 

Detailed Description

Provide the base class which defines the interface for controlling an NT service.

NT Services can be implemented using the framework defined by the ACE_NT_Service class, and the macros defined in this file. Some quick refresher notes on NT Services:

To use this facility, you could derive a class from ACE_Service_Object (if you want to start via ACE's service configurator), or use any other class to run when the image starts (assuming that NT runs the image). You must set up an NT SERVICE_TABLE_ENTRY array to define your service(s). You can use the ACE_NT_SERVICE_... macros defined below for this.

A SERVICE_TABLE might look like this: ACE_NT_SERVICE_REFERENCE(Svc1); // If service is in another file SERVICE_TABLE_ENTRY myServices[] = { ACE_NT_SERVICE_ENTRY ("MyNeatService", Svc1), { 0, 0 } };

In the file where your service(s) are implemented, use the ACE_NT_SERVICE_DEFINE macro to set up the following:

  1. A pointer to the service's implementation object (must be derived from ACE_NT_Service).
  2. The service's Handler function (forwards all requests to the ACE_NT_Service-derived object's handle_control function).
  3. The service's ServiceMain function. Creates a new instance of the ACE_NT_Service-derived class SVCCLASS, unless one has been created already.

If you are using all the default constructor values, you can let the generated ServiceMain function create the object, else you need to create it by hand before calling StartServiceCtrlDispatcher. Set the pointer so ServiceMain won't create another one. Another reason you may want to do the object creation yourself is if you want to also implement suspend and resume functions (the ones inherited from ACE_Service_Object) to do something intelligent to the services which are running, like call their handle_control functions to request suspend and resume actions, similar to what NT would do if a Services control panel applet would do if the user clicks on Suspend.

Constructor & Destructor Documentation

ACE_NT_Service::ACE_NT_Service ( DWORD  start_timeout = ACE_NT_SERVICE_START_TIMEOUT,
DWORD  service_type = SERVICE_WIN32_OWN_PROCESS,
DWORD  controls_mask = SERVICE_ACCEPT_STOP 
)
inline

Constructor primarily for use when running the service.

ACE_NT_Service::ACE_NT_Service ( const ACE_TCHAR name,
const ACE_TCHAR desc = 0,
DWORD  start_timeout = ACE_NT_SERVICE_START_TIMEOUT,
DWORD  service_type = SERVICE_WIN32_OWN_PROCESS,
DWORD  controls_mask = SERVICE_ACCEPT_STOP 
)
inline

Constructor primarily for use when inserting/removing/controlling the service.

ACE_NT_Service::~ACE_NT_Service ( void  )
virtual

Member Function Documentation

void ACE_NT_Service::capture_log_msg_attributes ( void  )

Set the ACE_Log_Msg attributes that the service thread will use to initialize its ACE_Log_Msg instance. This is how the initiating thread's logging ostream, etc. get into the service thread. The logging attributes in effect when this function is called are what the service thread will have at its disposal when it starts; therefore, the main thread should set up logging options for the process, and call this function just before calling the StartServiceCtrlDispatcher function.

void ACE_NT_Service::continue_requested ( DWORD  control_code)
protectedvirtual

Called by <handle_control> when a continue was requested.

int ACE_NT_Service::continue_svc ( ACE_Time_Value wait_time = 0,
DWORD *  svc_state = 0 
)

Continue the service.

const ACE_TCHAR * ACE_NT_Service::desc ( void  ) const
inline

Get the service description.

int ACE_NT_Service::fini ( void  )
virtual

Hook called when terminating the service. Inherited from ACE_Shared_Object. Default implementation sets the service status to SERVICE_STOPPED.

Reimplemented from ACE_Shared_Object.

void ACE_NT_Service::handle_control ( DWORD  control_code)
virtual

This function is called in response to a request from the Service Dispatcher. It must interact with the <svc> function to effect the requested control operation. The default implementation handles all requests as follows: SERVICE_CONTROL_STOP: set stop pending, set cancel flag SERVICE_CONTROL_PAUSE: set pause pending, <suspend>, set paused SERVICE_CONTROL_CONTINUE: set continue pending, <resume>, set running SERVICE_CONTROL_INTERROGATE: reports current status SERVICE_CONTROL_SHUTDOWN: same as SERVICE_CONTROL_STOP.

void ACE_NT_Service::host ( const ACE_TCHAR host)

Sets the host machine.

const ACE_TCHAR * ACE_NT_Service::host ( void  ) const
inline

Get the host machine.

void ACE_NT_Service::inherit_log_msg_attributes ( void  )

Set the ACE_Log_Msg attributes in the current thread to those saved in the most recent call to capture_log_msg_attributes(). This function should be called from the service's service thread. Ideally, it is the first method called to be sure that any logging done is incorporated correctly into the process's established logging setup.

int ACE_NT_Service::insert ( DWORD  start_type = SERVICE_DEMAND_START,
DWORD  error_control = SERVICE_ERROR_IGNORE,
const ACE_TCHAR exe_path = 0,
const ACE_TCHAR group_name = 0,
LPDWORD  tag_id = 0,
const ACE_TCHAR dependencies = 0,
const ACE_TCHAR account_name = 0,
const ACE_TCHAR password = 0,
DWORD  desired_access = SERVICE_ALL_ACCESS 
)

Insert (create) the service in the NT Service Control Manager, with the given creation values. exe_path defaults to the path name of the program that calls the function. All other 0-defaulted arguments pass 0 into the service creation, taking NT_specified defaults. Returns -1 on error, 0 on success.

void ACE_NT_Service::interrogate_requested ( DWORD  control_code)
protectedvirtual

Called by <handle_control> when a interrogate was requested.

void ACE_NT_Service::name ( const ACE_TCHAR name,
const ACE_TCHAR desc = 0 
)

Sets the name and description for the service. If desc is 0, it takes the same value as name.

const ACE_TCHAR * ACE_NT_Service::name ( void  ) const
inline

Get the service name.

int ACE_NT_Service::open ( void *  args = 0)
virtual

Hook called to open the service. By default, sets the service status to SERVICE_START_PENDING, calls the svc() method, interprets and sets the service status, and returns.

Reimplemented from ACE_Task_Base.

void ACE_NT_Service::pause_requested ( DWORD  control_code)
protectedvirtual

Called by <handle_control> when a pause was requested.

int ACE_NT_Service::pause_svc ( ACE_Time_Value wait_time = 0,
DWORD *  svc_state = 0 
)

Pause the service.

int ACE_NT_Service::remove ( void  )

Remove the service from the NT Service Control Manager. Returns -1 on error, 0 on success. This just affects the SCM and registry - the can and will keep running fine if it is already running.

int ACE_NT_Service::report_status ( DWORD  new_status,
DWORD  time_hint = 0 
)
protected
int ACE_NT_Service::start_svc ( ACE_Time_Value wait_time = 0,
DWORD *  svc_state = 0,
DWORD  argc = 0,
const ACE_TCHAR **  argv = 0 
)

Start the service (must have been inserted before). wait_time is the time to wait for the service to reach a steady state before returning. If it is 0, the function waits as long as it takes for the service to reach the 'running' state, or gets stuck in some other state, or exits. If wait_time is supplied, it is updated on return to hold the service's last reported wait hint. svc_state can be used to receive the state which the service settled in. If the value is 0, the service never ran. argc/argv are passed to the service's ServiceMain function when it starts. Returns 0 for success, -1 for error.

int ACE_NT_Service::startup ( DWORD  startup)

Sets the startup type for the service. Returns -1 on error, 0 on success.

DWORD ACE_NT_Service::startup ( void  )

Returns the current startup type.

DWORD ACE_NT_Service::state ( ACE_Time_Value wait_hint = 0)

Get the current state for the service. If <wait_hint> is not 0, it receives the service's reported wait hint. Note that this function returns 0 on failure (not -1 as is usual in ACE). A zero return would (probably) only be returned if there is either no service with the given name in the SCM database, or the caller does not have sufficient rights to access the service state. The set of valid service state values are all greater than 0.

int ACE_NT_Service::state ( DWORD *  pstate,
ACE_Time_Value wait_hint = 0 
)

A version of <state> that returns -1 for failure, 0 for success. The DWORD pointed to by pstate receives the state value.

void ACE_NT_Service::stop_requested ( DWORD  control_code)
protectedvirtual

Called by <handle_control> when a stop/shutdown was requested.

int ACE_NT_Service::stop_svc ( ACE_Time_Value wait_time = 0,
DWORD *  svc_state = 0 
)

Requests the service to stop. Will wait up to wait_time for the service to actually stop. If not specified, the function waits until the service either stops or gets stuck in some other state before it stops. If <svc_state> is specified, it receives the last reported state of the service. Returns 0 if the request was made successfully, -1 if not.

int ACE_NT_Service::svc ( void  )
inlinevirtual

The actual service implementation. This function need not be overridden by applications that are just using SCM capabilities, but must be by subclasses when actually running the service. It is expected that this function will set the status to RUNNING.

Reimplemented from ACE_Task_Base.

void ACE_NT_Service::svc_handle ( const SERVICE_STATUS_HANDLE  new_svc_handle)
inline

Set the svc_handle_ member. This is only a public function because the macro-generated service function calls it.

SC_HANDLE ACE_NT_Service::svc_sc_handle ( void  )
protected

Return the svc_sc_handle_ member. If the member is null, it retrieves the handle from the Service Control Manager and caches it.

int ACE_NT_Service::test_access ( DWORD  desired_access = SERVICE_ALL_ACCESS)

Test access to the object's service in the SCM. The service must already have been inserted in the SCM database. This function has no affect on the service itself. Returns 0 if the specified access is allowed, -1 otherwise (either the access is denied, or there is a problem with the service's definition - check ACE_OS::last_error to get the specific error indication.

void ACE_NT_Service::wait_for_service_state ( DWORD  desired_state,
ACE_Time_Value wait_time 
)
protected

Waits for the service to reach <desired_state> or get (apparently) stuck before it reaches that state. Will wait at most wait_time to get to the desired state. If wait_time is 0, then the function keeps waiting until the desired state is reached or the service doesn't update its state any further. The svc_status_ class member is updated upon return.

Member Data Documentation

ACE_NT_Service::ACE_ALLOC_HOOK_DECLARE

Declare the dynamic allocation hooks.

ACE_TCHAR* ACE_NT_Service::desc_
protected
ACE_TCHAR* ACE_NT_Service::host_
protected
ACE_OS_Log_Msg_Attributes ACE_NT_Service::log_msg_attributes_
protected

ACE_Log_Msg attributes to inherit from the starting thread.

ACE_TCHAR* ACE_NT_Service::name_
protected
DWORD ACE_NT_Service::start_time_
protected

Estimate of init time needed.

SERVICE_STATUS_HANDLE ACE_NT_Service::svc_handle_
protected

Service handle - doesn't need close.

SC_HANDLE ACE_NT_Service::svc_sc_handle_
protected

Service's SCM handle.

SERVICE_STATUS ACE_NT_Service::svc_status_
protected

The documentation for this class was generated from the following files: