# ACE_Thread_Manager Class Reference

Manages a pool of threads. More...

`#include <Thread_Manager.h>`

Collaboration diagram for ACE_Thread_Manager:

[legend]
List of all members.

## Public Types

typedef int(ACE_Thread_Manager::* | ACE_THR_MEMBER_FUNC )(ACE_Thread_Descriptor *, int)
enum | { ACE_THR_IDLE = 0x00000000, ACE_THR_SPAWNED = 0x00000001, ACE_THR_RUNNING = 0x00000002, ACE_THR_SUSPENDED = 0x00000004, ACE_THR_CANCELLED = 0x00000008, ACE_THR_TERMINATED = 0x00000010, ACE_THR_JOINING = 0x10000000 }

## Public Member Functions

| ACE_Thread_Manager (size_t preaolloc=ACE_DEFAULT_THREAD_MANAGER_PREALLOC, size_t lwm=ACE_DEFAULT_THREAD_MANAGER_LWM, size_t inc=ACE_DEFAULT_THREAD_MANAGER_INC, size_t hwm=ACE_DEFAULT_THREAD_MANAGER_HWM)
| Initialization and termination methods.
virtual | ~ACE_Thread_Manager (void)
int | open (size_t size=0)
| No-op. Currently unused.
int | close (void)
int | spawn (ACE_THR_FUNC func, void *arg=0, long flags=THR_NEW_LWP|THR_JOINABLE|THR_INHERIT_SCHED, ACE_thread_t *=0, ACE_hthread_t *t_handle=0, long priority=ACE_DEFAULT_THREAD_PRIORITY, int grp_id=-1, void *stack=0, size_t stack_size=0)
int | spawn_n (size_t n, ACE_THR_FUNC func, void *arg=0, long flags=THR_NEW_LWP|THR_JOINABLE|THR_INHERIT_SCHED, 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)
int | spawn_n (ACE_thread_t thread_ids[], size_t n, ACE_THR_FUNC func, void *arg, long flags, long priority=ACE_DEFAULT_THREAD_PRIORITY, int grp_id=-1, void *stack[]=0, size_t stack_size[]=0, ACE_hthread_t thread_handles[]=0, ACE_Task_Base *task=0)
ACE_THR_FUNC_RETURN | exit (ACE_THR_FUNC_RETURN status=0, int do_thread_exit=1)
int | wait (const ACE_Time_Value *timeout=0, int abandon_detached_threads=0)
int | join (ACE_thread_t tid, ACE_THR_FUNC_RETURN *status=0)
| Join a thread specified by <tid>. Do not wait on a detached thread.
int | wait_grp (int grp_id)
int | thr_self (ACE_hthread_t &)
ACE_thread_t | thr_self (void)
ACE_Task_Base * | task (void)
int | suspend_all (void)
| Suspend all threads.
int | suspend (ACE_thread_t)
| Suspend a single thread.
int | suspend_grp (int grp_id)
| Suspend a group of threads.
int | testsuspend (ACE_thread_t t_id)
int | resume_all (void)
| Resume all stopped threads.
int | resume (ACE_thread_t)
| Resume a single thread.
int | resume_grp (int grp_id)
| Resume a group of threads.
int | testresume (ACE_thread_t t_id)
int | kill_all (int signum)
int | kill (ACE_thread_t, int signum)
int | kill_grp (int grp_id, int signum)
int | cancel_all (int async_cancel=0)
int | cancel (ACE_thread_t, int async_cancel=0)
int | cancel_grp (int grp_id, int async_cancel=0)
int | testcancel (ACE_thread_t t_id)
int | testterminate (ACE_thread_t t_id)
int | set_grp (ACE_thread_t, int grp_id)
| Set group ids for a particular thread id.
int | get_grp (ACE_thread_t, int &grp_id)
| Get group ids for a particular thread id.
int | wait_task (ACE_Task_Base *task)
int | suspend_task (ACE_Task_Base *task)
int | resume_task (ACE_Task_Base *task)
int | kill_task (ACE_Task_Base *task, int signum)
int | cancel_task (ACE_Task_Base *task, int async_cancel=0)
int | hthread_within (ACE_hthread_t handle)
int | thread_within (ACE_thread_t tid)
int | num_tasks_in_group (int grp_id)
| Returns the number of <ace_task_base> in a group.
int | num_threads_in_task (ACE_Task_Base *task)
| Returns the number of threads in an <ace_task_base>.
ssize_t | task_list (int grp_id, ACE_Task_Base *task_list[], size_t n)
ssize_t | thread_list (ACE_Task_Base *task, ACE_thread_t thread_list[], size_t n)
ssize_t | hthread_list (ACE_Task_Base *task, ACE_hthread_t hthread_list[], size_t n)
ssize_t | thread_grp_list (int grp_id, ACE_thread_t thread_list[], size_t n)
ssize_t | hthread_grp_list (int grp_id, ACE_hthread_t hthread_list[], size_t n)
ssize_t | task_all_list (ACE_Task_Base *task_list[], size_t n)
ssize_t | thread_all_list (ACE_thread_t thread_list[], size_t n)
int | set_grp (ACE_Task_Base *task, int grp_id)
| Set group ids for a particular task.
int | get_grp (ACE_Task_Base *task, int &grp_id)
| Get group ids for a particular task.
size_t | count_threads (void) const
int | thr_state (ACE_thread_t id, ACE_UINT32 &state)
int | at_exit (ACE_At_Thread_Exit *cleanup)
int | at_exit (ACE_At_Thread_Exit &cleanup)
int | at_exit (void *object, ACE_CLEANUP_FUNC cleanup_hook, void *param)
void | wait_on_exit (int dowait)
int | wait_on_exit (void)
void | dump (void)
| Dump the state of an object.

## Static Public Member Functions

ACE_Thread_Manager * | instance (void)
| Get pointer to a process-wide <ace_thread_manager>.
ACE_Thread_Manager * | instance (ACE_Thread_Manager *)
void | close_singleton (void)
| Delete the dynamically allocated Singleton.

## Public Attributes

| ACE_ALLOC_HOOK_DECLARE
| Declare the dynamic allocation hooks.

## Protected Member Functions

ACE_Thread_Descriptor * | thread_desc_self (void)
ACE_Thread_Descriptor * | thread_descriptor (ACE_thread_t)
ACE_Thread_Descriptor * | hthread_descriptor (ACE_hthread_t)
virtual int | spawn_i (ACE_THR_FUNC func, void *arg, long flags, ACE_thread_t *=0, ACE_hthread_t *t_handle=0, long priority=ACE_DEFAULT_THREAD_PRIORITY, int grp_id=-1, void *stack=0, size_t stack_size=0, ACE_Task_Base *task=0)
| Create a new thread (must be called with locks held).
void | run_thread_exit_hooks (int i)
| Run the registered hooks when the thread exits.
ACE_Thread_Descriptor * | find_thread (ACE_thread_t t_id)
ACE_Thread_Descriptor * | find_hthread (ACE_hthread_t h_id)
ACE_Thread_Descriptor * | find_task (ACE_Task_Base *task, size_t slot=0)
int | insert_thr (ACE_thread_t t_id, ACE_hthread_t, int grp_id=-1, long flags=0)
| Insert a thread in the table (checks for duplicates).
int | append_thr (ACE_thread_t t_id, ACE_hthread_t, ACE_UINT32, int grp_id, ACE_Task_Base *task=0, long flags=0, ACE_Thread_Descriptor *td=0)
void | remove_thr (ACE_Thread_Descriptor *td, int close_handler)
| Remove thread from the table.
void | remove_thr_all (void)
| Remove all threads from the table.
int | check_state (ACE_UINT32 state, ACE_thread_t thread, int enable=1)
int | apply_task (ACE_Task_Base *task, ACE_THR_MEMBER_FUNC, int=0)
| Apply <func> to all members of the table that match the <task>.
int | apply_grp (int grp_id, ACE_THR_MEMBER_FUNC func, int arg=0)
| Apply <func> to all members of the table that match the <grp_id>.
int | apply_all (ACE_THR_MEMBER_FUNC, int=0)
| Apply <func> to all members of the table.
int | join_thr (ACE_Thread_Descriptor *td, int=0)
| Join the thread described in <tda>.
int | resume_thr (ACE_Thread_Descriptor *td, int=0)
| Resume the thread described in <tda>.
int | suspend_thr (ACE_Thread_Descriptor *td, int=0)
| Suspend the thread described in <tda>.
int | kill_thr (ACE_Thread_Descriptor *td, int signum)
| Send signal <signum> to the thread described in <tda>.
int | cancel_thr (ACE_Thread_Descriptor *td, int async_cancel=0)
| Set the cancellation flag for the thread described in <tda>.
int | register_as_terminated (ACE_Thread_Descriptor *td)
| Register a thread as terminated and put it into the <terminated_thr_list_>.

## Static Protected Member Functions

int | set_thr_exit (ACE_TSS_TYPE(ACE_Thread_Exit)*ptr)
| Setting the static ACE_TSS_TYPE (ACE_Thread_Exit) *thr_exit_ pointer.

## Protected Attributes

ACE_Double_Linked_List< ACE_Thread_Descriptor > | thr_list_
ACE_Double_Linked_List< ACE_Thread_Descriptor_Base > | terminated_thr_list_
| Collect terminated but not yet joined thread entries.
ACE_Unbounded_Queue< ACE_Thread_Descriptor * > | thr_to_be_removed_
| Collect pointers to thread descriptors of threads to be removed later.
int | grp_id_
| Keeps track of the next group id to assign.
int | automatic_wait_
ACE_Thread_Mutex | lock_
| Serialize access to the <zero_cond_>.
ACE_Condition_Thread_Mutex | zero_cond_
| Keep track of when there are no more threads.
ACE_Locked_Free_List< ACE_Thread_Descriptor, ACE_SYNCH_MUTEX > | thread_desc_freelist_

## Static Private Member Functions

| ACE_TSS_TYPE (ACE_Thread_Exit)*thr_exit_
| Global ACE_TSS (ACE_Thread_Exit) object ptr.

## Static Private Attributes

ACE_Thread_Manager * | thr_mgr_ = 0
| Pointer to a process-wide <ace_thread_manager>.
int | delete_thr_mgr_ = 0
| Must delete the <thr_mgr_> if non-0.

## Friends

class | ACE_Thread_Control
class | ACE_Thread_Exit
class | ACE_Thread_Descriptor

## Detailed Description

Manages a pool of threads.

This class allows operations on groups of threads atomically. The default behavior of thread manager is to wait on all threads under it's management when it gets destructed. Therefore, remember to remove a thread from thread manager if you don't want it to wait for the thread. There are also function to disable this default wait-on-exit behavior. However, if your program depends on turning this off to run correctly, you are probably doing something wrong. Rule of thumb, use ACE_Thread to manage your daemon threads. Notice that if there're threads live beyond the scope of <main>, you are sure to have resource leaks in your program. Remember to wait on threads before exiting <main> if that could happen in your programs.

## Member Typedef Documentation

typedef int(ACE_Thread_Manager::* ACE_Thread_Manager::ACE_THR_MEMBER_FUNC)(ACE_Thread_Descriptor *, int)

## Member Enumeration Documentation

anonymous enum

These are the various states a thread managed by the ACE_Thread_Manager can be in.

Enumeration values:

  ACE_THR_IDLE | Uninitialized.
  ACE_THR_SPAWNED | Created but not yet running.
  ACE_THR_RUNNING | Thread is active (naturally, we don't know if it's actually running* because we aren't the scheduler...).
  ACE_THR_SUSPENDED | Thread is suspended.
  ACE_THR_CANCELLED | Thread has been cancelled (which is an indiction that it needs to terminate...).
  ACE_THR_TERMINATED | Thread has shutdown, but the slot in the thread manager hasn't been reclaimed yet.
  ACE_THR_JOINING | Join operation has been invoked on the thread by thread manager.

## Constructor & Destructor Documentation

ACE_Thread_Manager::ACE_Thread_Manager | ( | size_t | preaolloc = `ACE_DEFAULT_THREAD_MANAGER_PREALLOC`,
|  | size_t | lwm = `ACE_DEFAULT_THREAD_MANAGER_LWM`,
|  | size_t | inc = `ACE_DEFAULT_THREAD_MANAGER_INC`,
|  | size_t | hwm = `ACE_DEFAULT_THREAD_MANAGER_HWM`
| ) |

Initialization and termination methods.

Internally, ACE_Thread_Manager keeps a freelist for caching resources it uses to keep track of managed threads (not the threads themselves.) prealloc, lwm, inc, determine the initial size, the low water mark, increment step, and high water mark of the freelist.

See also:
  ACE_Free_List

ACE_Thread_Manager::~ACE_Thread_Manager | ( | void |  | ) | `[virtual]`

## Member Function Documentation

ACE_Thread_Manager::ACE_TSS_TYPE | ( | ACE_Thread_Exit |  | ) | `[static, private]`

| Global ACE_TSS (ACE_Thread_Exit) object ptr.

int ACE_Thread_Manager::append_thr | ( | ACE_thread_t | t_id,
|  | ACE_hthread_t | ,
|  | ACE_UINT32 | ,
|  | int | grp_id,
|  | ACE_Task_Base * | task = `0`,
|  | long | flags = `0`,
|  | ACE_Thread_Descriptor * | td = `0`
| ) | `[protected]`

| Append a thread in the table (adds at the end, growing the table if necessary).

int ACE_Thread_Manager::apply_all | ( | ACE_THR_MEMBER_FUNC | ,
|  | int | = `0`
| ) | `[protected]`

| Apply <func> to all members of the table.

int ACE_Thread_Manager::apply_grp | ( | int | grp_id,
|  | ACE_THR_MEMBER_FUNC | func,
|  | int | arg = `0`
| ) | `[protected]`

| Apply <func> to all members of the table that match the <grp_id>.

int ACE_Thread_Manager::apply_task | ( | ACE_Task_Base * | task,
|  | ACE_THR_MEMBER_FUNC | ,
|  | int | = `0`
| ) | `[protected]`

| Apply <func> to all members of the table that match the <task>.

ACE_INLINE int ACE_Thread_Manager::at_exit | ( | void * | object,
|  | ACE_CLEANUP_FUNC | cleanup_hook,
|  | void * | param
| ) |

Deprecated:
  This function is deprecated. Please use the previous two at_exit method. Notice that you should avoid mixing this method with the previous two at_exit methods.

Register an object (or array) for cleanup at thread termination. "cleanup_hook" points to a (global, or static member) function that is called for the object or array when it to be destroyed. It may perform any necessary cleanup specific for that object or its class. "param" is passed as the second parameter to the "cleanup_hook" function; the first parameter is the object (or array) to be destroyed. "cleanup_hook", for example, may delete the object (or array). If <cleanup_hook> == 0, the <object> will _NOT_ get cleanup at thread exit. You can use this to cancel the previously added at_exit.

ACE_INLINE int ACE_Thread_Manager::at_exit | ( | ACE_At_Thread_Exit & | cleanup | ) |

| Register an At_Thread_Exit hook and the ownership is retained for the caller. Normally used when the at_exit hook is created in stack.

ACE_INLINE int ACE_Thread_Manager::at_exit | ( | ACE_At_Thread_Exit * | cleanup | ) |

| Register an At_Thread_Exit hook and the ownership is acquire by Thread_Descriptor, this is the usual case when the AT is dynamically allocated.

int ACE_Thread_Manager::cancel | ( | ACE_thread_t | ,
|  | int | async_cancel = `0`
| ) |

| Cancel a single thread.

int ACE_Thread_Manager::cancel_all | ( | int | async_cancel = `0` | ) |

| Cancel's all the threads.

int ACE_Thread_Manager::cancel_grp | ( | int | grp_id,
|  | int | async_cancel = `0`
| ) |

| Cancel a group of threads.

int ACE_Thread_Manager::cancel_task | ( | ACE_Task_Base * | task,
|  | int | async_cancel = `0`
| ) |

| Cancel all threads in an <ace_task>. If <async_cancel> is non-0, then asynchronously cancel these threads if the OS platform supports cancellation. Otherwise, perform a "cooperative" cancellation.

int ACE_Thread_Manager::cancel_thr | ( | ACE_Thread_Descriptor * | td,
|  | int | async_cancel = `0`
| ) | `[protected]`

| Set the cancellation flag for the thread described in <tda>.

int ACE_Thread_Manager::check_state | ( | ACE_UINT32 | state,
|  | ACE_thread_t | thread,
|  | int | enable = `1`
| ) | `[protected]`

| Efficiently check whether <thread> is in a particular <state>. This call updates the TSS cache if possible to speed up subsequent searches.

int ACE_Thread_Manager::close | ( | void |  | ) |

| Release all resources. By default, this method will wait till all threads exit. However, when called from <close_singleton>, most global resources are destroyed and thus, we don't try to wait but just clean up the thread descriptor list.

void ACE_Thread_Manager::close_singleton | ( | void |  | ) | `[static]`

| Delete the dynamically allocated Singleton.

ACE_INLINE size_t ACE_Thread_Manager::count_threads | ( | void |  | ) | const

| Return a count of the current number of threads active in the <thread_manager>.

void ACE_Thread_Manager::dump | ( | void |  | ) |

| Dump the state of an object.

ACE_THR_FUNC_RETURN ACE_Thread_Manager::exit | ( | ACE_THR_FUNC_RETURN | status = `0`,
|  | int | do_thread_exit = `1`
| ) |

Called to clean up when a thread exits.

Parameters:

  | do_thread_exit | If non-0 then ACE_Thread::exit is called to exit the thread
  | status | If ACE_Thread_Exit is called, this is passed as the exit value of the thread. Should _not_ be called by main thread.

ACE_Thread_Descriptor * ACE_Thread_Manager::find_hthread | ( | ACE_hthread_t | h_id | ) | `[protected]`

| Locate the index of the table slot occupied by <h_id>. Returns -1 if <h_id> is not in the table doesn't contain <h_id>.

ACE_Thread_Descriptor * ACE_Thread_Manager::find_task | ( | ACE_Task_Base * | task,
|  | size_t | slot = `0`
| ) | `[protected]`

| Locate the thread descriptor address of the list occupied by <task>. Returns 0 if <task> is not in the table doesn't contain <task>.

ACE_Thread_Descriptor * ACE_Thread_Manager::find_thread | ( | ACE_thread_t | t_id | ) | `[protected]`

| Locate the index of the table slot occupied by <t_id>. Returns -1 if <t_id> is not in the table doesn't contain <t_id>.

int ACE_Thread_Manager::get_grp | ( | ACE_Task_Base * | task,
|  | int & | grp_id
| ) |

| Get group ids for a particular task.

int ACE_Thread_Manager::get_grp | ( | ACE_thread_t | ,
|  | int & | grp_id
| ) |

| Get group ids for a particular thread id.

ACE_Thread_Descriptor * ACE_Thread_Manager::hthread_descriptor | ( | ACE_hthread_t |  | ) | `[protected]`

| Return a pointer to the thread's Thread_Descriptor, 0 if fail.

ssize_t ACE_Thread_Manager::hthread_grp_list | ( | int | grp_id,
|  | ACE_hthread_t | hthread_list[],
|  | size_t | n
| ) |

| Returns in <hthread_list> a list of up to <n> thread handles in a group <grp_id>. The caller must allocate memory for <hthread_list>.

ssize_t ACE_Thread_Manager::hthread_list | ( | ACE_Task_Base * | task,
|  | ACE_hthread_t | hthread_list[],
|  | size_t | n
| ) |

| Returns in <hthread_list> a list of up to <n> thread handles in an <ace_task_base>. The caller must allocate memory for <hthread_list>. In case of an error, -1 is returned. If no requested values are found, 0 is returned, otherwise correct number of retrieved values are returned.

int ACE_Thread_Manager::hthread_within | ( | ACE_hthread_t | handle | ) |

| Check if the thread is managed by the thread manager. Return true if the thread is found, false otherwise.

int ACE_Thread_Manager::insert_thr | ( | ACE_thread_t | t_id,
|  | ACE_hthread_t | ,
|  | int | grp_id = `-1`,
|  | long | flags = `0`
| ) | `[protected]`

| Insert a thread in the table (checks for duplicates).

ACE_Thread_Manager * ACE_Thread_Manager::instance | ( | ACE_Thread_Manager * |  | ) | `[static]`

| Set pointer to a process-wide <ace_thread_manager> and return existing pointer.

ACE_Thread_Manager * ACE_Thread_Manager::instance | ( | void |  | ) | `[static]`

| Get pointer to a process-wide <ace_thread_manager>.

int ACE_Thread_Manager::join | ( | ACE_thread_t | tid,
|  | ACE_THR_FUNC_RETURN * | status = `0`
| ) |

| Join a thread specified by <tid>. Do not wait on a detached thread.

int ACE_Thread_Manager::join_thr | ( | ACE_Thread_Descriptor * | td,
|  | int | = `0`
| ) | `[protected]`

| Join the thread described in <tda>.

int ACE_Thread_Manager::kill | ( | ACE_thread_t | ,
|  | int | signum
| ) |

int ACE_Thread_Manager::kill_all | ( | int | signum | ) |

| Send <signum> to all stopped threads. Not supported on platforms that do not have advanced signal support, such as Win32. Send the <signum> to a single thread. Not supported on platforms that do not have advanced signal support, such as Win32. Send <signum> to a group of threads, not supported on platforms that do not have advanced signal support, such as Win32.

int ACE_Thread_Manager::kill_grp | ( | int | grp_id,
|  | int | signum
| ) |

int ACE_Thread_Manager::kill_task | ( | ACE_Task_Base * | task,
|  | int | signum
| ) |

| Send a signal <signum> to all threads in an <ace_task>.

int ACE_Thread_Manager::kill_thr | ( | ACE_Thread_Descriptor * | td,
|  | int | signum
| ) | `[protected]`

| Send signal <signum> to the thread described in <tda>.

int ACE_Thread_Manager::num_tasks_in_group | ( | int | grp_id | ) |

| Returns the number of <ace_task_base> in a group.

int ACE_Thread_Manager::num_threads_in_task | ( | ACE_Task_Base * | task | ) |

| Returns the number of threads in an <ace_task_base>.

ACE_INLINE int ACE_Thread_Manager::open | ( | size_t | size = `0` | ) |

| No-op. Currently unused.

ACE_INLINE int ACE_Thread_Manager::register_as_terminated | ( | ACE_Thread_Descriptor * | td | ) | `[protected]`

| Register a thread as terminated and put it into the <terminated_thr_list_>.

void ACE_Thread_Manager::remove_thr | ( | ACE_Thread_Descriptor * | td,
|  | int | close_handler
| ) | `[protected]`

| Remove thread from the table.

void ACE_Thread_Manager::remove_thr_all | ( | void |  | ) | `[protected]`

| Remove all threads from the table.

int ACE_Thread_Manager::resume | ( | ACE_thread_t |  | ) |

| Resume a single thread.

int ACE_Thread_Manager::resume_all | ( | void |  | ) |

| Resume all stopped threads.

int ACE_Thread_Manager::resume_grp | ( | int | grp_id | ) |

| Resume a group of threads.

int ACE_Thread_Manager::resume_task | ( | ACE_Task_Base * | task | ) |

| Resume all threads in an ACE_Task.

int ACE_Thread_Manager::resume_thr | ( | ACE_Thread_Descriptor * | td,
|  | int | = `0`
| ) | `[protected]`

| Resume the thread described in <tda>.

void ACE_Thread_Manager::run_thread_exit_hooks | ( | int | i | ) | `[protected]`

| Run the registered hooks when the thread exits.

int ACE_Thread_Manager::set_grp | ( | ACE_Task_Base * | task,
|  | int | grp_id
| ) |

| Set group ids for a particular task.

int ACE_Thread_Manager::set_grp | ( | ACE_thread_t | ,
|  | int | grp_id
| ) |

| Set group ids for a particular thread id.

int ACE_Thread_Manager::set_thr_exit | ( | ACE_TSS_TYPE(ACE_Thread_Exit)* | ptr | ) | `[static, protected]`

| Setting the static ACE_TSS_TYPE (ACE_Thread_Exit) *thr_exit_ pointer.

int ACE_Thread_Manager::spawn | ( | ACE_THR_FUNC | func,
|  | void * | arg = `0`,
|  | long | flags = `THR_NEW_LWP|THR_JOINABLE|THR_INHERIT_SCHED`,
|  | ACE_thread_t * | = `0`,
|  | ACE_hthread_t * | t_handle = `0`,
|  | long | priority = `ACE_DEFAULT_THREAD_PRIORITY`,
|  | int | grp_id = `-1`,
|  | void * | stack = `0`,
|  | size_t | stack_size = `0`
| ) |

| Create a new thread, which executes <func> with argument <arg>. Returns: on success a unique group id that can be used to control other threads added to the same group. On failure, returns -1.

int ACE_Thread_Manager::spawn_i | ( | ACE_THR_FUNC | func,
|  | void * | arg,
|  | long | flags,
|  | ACE_thread_t * | = `0`,
|  | ACE_hthread_t * | t_handle = `0`,
|  | long | priority = `ACE_DEFAULT_THREAD_PRIORITY`,
|  | int | grp_id = `-1`,
|  | void * | stack = `0`,
|  | size_t | stack_size = `0`,
|  | ACE_Task_Base * | task = `0`
| ) | `[protected, virtual]`

| Create a new thread (must be called with locks held).

int ACE_Thread_Manager::spawn_n | ( | ACE_thread_t | thread_ids[],
|  | size_t | n,
|  | ACE_THR_FUNC | func,
|  | void * | arg,
|  | long | flags,
|  | long | priority = `ACE_DEFAULT_THREAD_PRIORITY`,
|  | int | grp_id = `-1`,
|  | void * | stack[] = `0`,
|  | size_t | stack_size[] = `0`,
|  | ACE_hthread_t | thread_handles[] = `0`,
|  | ACE_Task_Base * | task = `0`
| ) |

Spawn N new threads, which execute <func> with argument <arg>. If <thread_ids> != 0 the thread_ids of successfully spawned threads will be placed into the <thread_ids> buffer (which must be the same size as <n>). If <stack> != 0 it is assumed to be an array of <n> pointers to the base of the stacks to use for the threads being spawned. If <stack_size> != 0 it is assumed to be an array of <n> values indicating how big each of the corresponding <stack>s are. If <thread_handles> != 0 it is assumed to be an array of <n> thread_handles that will be assigned the values of the thread handles being spawned.

Threads in Thread_Manager can be manipulated in groups based on <grp_id> or <task> using functions such as kill_grp() or cancel_task().

If <grp_id> is assigned, the newly spawned threads are added into the group. Otherwise, the Thread_Manager assigns these <n> threads with a grp_id. You should choose either assigning <grp_id> everytime, or let the Thread_Manager handles it for you consistently.

The argument <task> is usually assigned by <ACE_Task_Base::activate>. It associates the newly spawned threads with an ACE_Task instance, which defaults to <this>.

Return values:

  | -1 | on failure (<errno> will explain...), otherwise returns the group id of the threads.

int ACE_Thread_Manager::spawn_n | ( | size_t | n,
|  | ACE_THR_FUNC | func,
|  | void * | arg = `0`,
|  | long | flags = `THR_NEW_LWP|THR_JOINABLE|THR_INHERIT_SCHED`,
|  | 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`
| ) |

Spawn N new threads, which execute <func> with argument <arg>. If <thread_ids> != 0 the thread_ids of successfully spawned threads will be placed into the <thread_ids> buffer (which must be the same size as <n>). If <stack> != 0 it is assumed to be an array of <n> pointers to the base of the stacks to use for the threads being spawned. If <stack_size> != 0 it is assumed to be an array of <n> values indicating how big each of the corresponding <stack>s are. If <thread_handles> != 0 it is assumed to be an array of <n> thread_handles that will be assigned the values of the thread handles being spawned.

Threads in Thread_Manager can be manipulated in groups based on <grp_id> or <task> using functions such as kill_grp() or cancel_task().

If <grp_id> is assigned, the newly spawned threads are added into the group. Otherwise, the Thread_Manager assigns these <n> threads with a grp_id. You should choose either assigning <grp_id> everytime, or let the Thread_Manager handles it for you consistently.

The argument <task> is usually assigned by <ACE_Task_Base::activate>. It associates the newly spawned threads with an ACE_Task instance, which defaults to <this>.

Return values:

  | -1 | on failure (<errno> will explain...), otherwise returns the group id of the threads.

int ACE_Thread_Manager::suspend | ( | ACE_thread_t |  | ) |

| Suspend a single thread.

int ACE_Thread_Manager::suspend_all | ( | void |  | ) |

| Suspend all threads.

int ACE_Thread_Manager::suspend_grp | ( | int | grp_id | ) |

| Suspend a group of threads.

int ACE_Thread_Manager::suspend_task | ( | ACE_Task_Base * | task | ) |

| Suspend all threads in an ACE_Task.

int ACE_Thread_Manager::suspend_thr | ( | ACE_Thread_Descriptor * | td,
|  | int | = `0`
| ) | `[protected]`

| Suspend the thread described in <tda>.

ACE_INLINE ACE_Task_Base * ACE_Thread_Manager::task | ( | void |  | ) |

| Returns a pointer to the current <ace_task_base> we're executing in if this thread is indeed running in an <ace_task_base>, else return 0.

ssize_t ACE_Thread_Manager::task_all_list | ( | ACE_Task_Base * | task_list[],
|  | size_t | n
| ) |

Returns a list of ACE_Task_Base pointers corresponding to the tasks that have active threads managed by this instance.

Parameters:

  task_list

  is a pointer to an array to receive the list of pointers. The caller is responsible for supplying an array with at least
  - n entries.

  n

  The maximum number of ACE_Task_Base pointers to write in
  - task_list.

Return values:

  If

  successful, the number of pointers returned, which will be no greater than
  - n. Returns -1 on error.

Note:
  This method has no way to indicate if there are more than
  - n ACE_Task_Base pointers available. Therefore, it may be wise to guess a larger value of
  - n than one thinks in cases where the exact number of tasks is not known.

See also:
  count_threads()

ssize_t ACE_Thread_Manager::task_list | ( | int | grp_id,
|  | ACE_Task_Base * | task_list[],
|  | size_t | n
| ) |

Returns a list of ACE_Task_Base pointers corresponding to the tasks that have active threads in a specified thread group.

Parameters:

  | grp_id | The thread group ID to obtain task pointers for.

  task_list

  is a pointer to an array to receive the list of pointers. The caller is responsible for supplying an array with at least
  - n entries.

  n

  The maximum number of ACE_Task_Base pointers to write in
  - task_list.

Return values:

  If

  successful, the number of pointers returned, which will be no greater than
  - n. Returns -1 on error.

Note:
  This method has no way to indicate if there are more than
  - n ACE_Task_Base pointers available. Therefore, it may be wise to guess a larger value of
  - n than one thinks in cases where the exact number of tasks is not known.

See also:
  num_tasks_in_group(), task_all_list()

int ACE_Thread_Manager::testcancel | ( | ACE_thread_t | t_id | ) |

| True if <t_id> is cancelled, else false. Always return false if <t_id> is not managed by the Thread_Manager.

int ACE_Thread_Manager::testresume | ( | ACE_thread_t | t_id | ) |

| True if <t_id> is active (i.e., resumed), else false. Always return false if <t_id> is not managed by the Thread_Manager.

int ACE_Thread_Manager::testsuspend | ( | ACE_thread_t | t_id | ) |

| True if <t_id> is inactive (i.e., suspended), else false. Always return false if <t_id> is not managed by the Thread_Manager.

int ACE_Thread_Manager::testterminate | ( | ACE_thread_t | t_id | ) |

| True if <t_id> has terminated (i.e., is no longer running), but the slot in the thread manager hasn't been reclaimed yet, else false. Always return false if <t_id> is not managed by the Thread_Manager.

ACE_INLINE ACE_thread_t ACE_Thread_Manager::thr_self | ( | void |  | ) |

| Return the unique ID of the thread. This is not strictly necessary (because a thread can always just call <ACE_Thread::self>). However, we put it here to be complete.

int ACE_Thread_Manager::thr_self | ( | ACE_hthread_t & |  | ) |

Return the "real" handle to the calling thread, caching it if necessary in TSS to speed up subsequent lookups. This is necessary since on some platforms (e.g., Win32) we can't get this handle via direct method calls. Notice that you should *not* close the handle passed back from this method. It is used internally by Thread Manager. On the other hand, you *have to* use this internal thread handle when working on Thread_Manager. Return -1 if fail.

int ACE_Thread_Manager::thr_state | ( | ACE_thread_t | id,
|  | ACE_UINT32 & | state
| ) |

| Get the state of the thread. Returns false if the thread is not managed by this thread manager.

ssize_t ACE_Thread_Manager::thread_all_list | ( | ACE_thread_t | thread_list[],
|  | size_t | n
| ) |

| Returns in <thread_list> a list of up to <n> thread ids. The caller must allocate the memory for <thread_list>. In case of an error, -1 is returned. If no requested values are found, 0 is returned, otherwise correct number of retrieved values are returned.

ACE_INLINE ACE_Thread_Descriptor * ACE_Thread_Manager::thread_desc_self | ( | void |  | ) | `[protected]`

| Get a pointer to the calling thread's own thread_descriptor. This must be called from a spawn thread. This function will fetch the info from TSS.

ACE_Thread_Descriptor * ACE_Thread_Manager::thread_descriptor | ( | ACE_thread_t |  | ) | `[protected]`

| Return a pointer to the thread's Thread_Descriptor, 0 if fail.

ssize_t ACE_Thread_Manager::thread_grp_list | ( | int | grp_id,
|  | ACE_thread_t | thread_list[],
|  | size_t | n
| ) |

| Returns in <thread_list> a list of up to <n> thread ids in a group <grp_id>. The caller must allocate the memory for <thread_list>. In case of an error, -1 is returned. If no requested values are found, 0 is returned, otherwise correct number of retrieved values are returned.

ssize_t ACE_Thread_Manager::thread_list | ( | ACE_Task_Base * | task,
|  | ACE_thread_t | thread_list[],
|  | size_t | n
| ) |

| Returns in <thread_list> a list of up to <n> thread ids in an <ace_task_base>. The caller must allocate the memory for <thread_list>. In case of an error, -1 is returned. If no requested values are found, 0 is returned, otherwise correct number of retrieved values are returned.

int ACE_Thread_Manager::thread_within | ( | ACE_thread_t | tid | ) |

int ACE_Thread_Manager::wait | ( | const ACE_Time_Value * | timeout = `0`,
|  | int | abandon_detached_threads = `0`
| ) |

Block until there are no more threads running in the <thread_manager> or <timeout> expires. Note that <timeout> is treated as "absolute" time. Returns 0 on success and -1 on failure. If <abandon_detached_threads> is set, wait will first check thru its thread list for threads with THR_DETACHED or THR_DAEMON flags set and remove these threads. Notice that unlike other wait_* function, by default, <wait> does wait on all thread spawned by this thread_manager no matter the detached flags are set or not unless it is called with <abandon_detached_threads> flag set. NOTE that if this function is called while the ACE_Object_Manager is shutting down (as a result of program rundown via ACE::fini), it will not wait for any threads to complete. If you must wait for threads spawned by this thread manager to complete and you are in a ACE rundown situation (such as your object is being destroyed by the ACE_Object_Manager) you can use wait_grp instead.

int ACE_Thread_Manager::wait_grp | ( | int | grp_id | ) |

| Block until there are no more threads running in a group. Returns 0 on success and -1 on failure. Notice that wait_grp will not wait on detached threads.

ACE_INLINE int ACE_Thread_Manager::wait_on_exit | ( | void |  | ) |

ACE_INLINE void ACE_Thread_Manager::wait_on_exit | ( | int | dowait | ) |

| Access function to determine whether the Thread_Manager will wait for its thread to exit or not when being closing down.

int ACE_Thread_Manager::wait_task | ( | ACE_Task_Base * | task | ) |

Block until there are no more threads running in a specified task. This method will not wait for either detached or daemon threads; the threads must have been spawned with the `THR_JOINABLE` flag. Upon successful completion, the threads have been joined, so further attempts to join with any of the waited-for threads will fail.

Parameters:

  | task | The ACE_Task_Base object whose threads are to waited for.

Return values:

  | 0 | Success.
  | -1 | Failure (consult errno for further information).

## Friends And Related Function Documentation

friend class ACE_Thread_Control `[friend]`

friend class ACE_Thread_Descriptor `[friend]`

friend class ACE_Thread_Exit `[friend]`

## Member Data Documentation

ACE_Thread_Manager::ACE_ALLOC_HOOK_DECLARE

| Declare the dynamic allocation hooks.

int ACE_Thread_Manager::automatic_wait_ `[protected]`

| Set if we want the Thread_Manager to wait on all threads before being closed, reset otherwise.

int ACE_Thread_Manager::delete_thr_mgr_ = 0`[static, private]`

| Must delete the <thr_mgr_> if non-0.

int ACE_Thread_Manager::grp_id_ `[protected]`

| Keeps track of the next group id to assign.

ACE_Thread_Mutex ACE_Thread_Manager::lock_ `[protected]`

| Serialize access to the <zero_cond_>.

ACE_Double_Linked_List<ACE_Thread_Descriptor_Base> ACE_Thread_Manager::terminated_thr_list_ `[protected]`

| Collect terminated but not yet joined thread entries.

ACE_Double_Linked_List<ACE_Thread_Descriptor> ACE_Thread_Manager::thr_list_ `[protected]`

| Keeping a list of thread descriptors within the thread manager. Double-linked list enables us to cache the entries in TSS and adding/removing thread descriptor entries without affecting other thread's descriptor entries.

ACE_Thread_Manager * ACE_Thread_Manager::thr_mgr_ = 0`[static, private]`

| Pointer to a process-wide <ace_thread_manager>.

ACE_Unbounded_Queue<ACE_Thread_Descriptor*> ACE_Thread_Manager::thr_to_be_removed_ `[protected]`

| Collect pointers to thread descriptors of threads to be removed later.

ACE_Locked_Free_List<ACE_Thread_Descriptor, ACE_SYNCH_MUTEX> ACE_Thread_Manager::thread_desc_freelist_ `[protected]`

ACE_Condition_Thread_Mutex ACE_Thread_Manager::zero_cond_ `[protected]`

| Keep track of when there are no more threads.

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

- Thread_Manager.h
- Thread_Manager.cpp
- Thread_Manager.inl