1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/* -*- C++ -*- */
// $Id$
// ============================================================================
//
// = LIBRARY
// ace
//
// = FILENAME
// Thread.h
//
// = AUTHOR
// Doug Schmidt
//
// ============================================================================
#ifndef ACE_THREAD_H
#define ACE_THREAD_H
#include "ace/pre.h"
#include "ace/ACE.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
class ACE_Export ACE_Thread
{
// = TITLE
// Provides a wrapper for threads.
//
// = DESCRIPTION
// This class provides a common interface that is mapped onto
// POSIX Pthreads, Solaris threads, Win32 threads, VxWorks
// threads, or pSoS threads. Note, however, that it is
// generally a better idea to use the <ACE_Thread_Manager>
// programming API rather than the <ACE_Thread> API since the
// thread manager is more powerful.
public:
static int spawn (ACE_THR_FUNC func,
void *arg = 0,
long flags = THR_NEW_LWP | THR_JOINABLE,
ACE_thread_t *t_id = 0,
ACE_hthread_t *t_handle = 0,
long priority = ACE_DEFAULT_THREAD_PRIORITY,
void *stack = 0,
size_t stack_size = 0,
ACE_Thread_Adapter *thread_adapter = 0);
// Creates a new thread having <flags> attributes and running <func>
// with <args> (if <thread_adapter> is non-0 then <func> and <args>
// are ignored and are obtained from <thread_adapter>). <thr_id>
// and <t_handle> are set to the thread's ID and handle (?),
// respectively. The thread runs at <priority> priority (see
// below).
//
// The <flags> are a bitwise-OR of the following:
// = BEGIN<INDENT>
// THR_CANCEL_DISABLE, THR_CANCEL_ENABLE, THR_CANCEL_DEFERRED,
// THR_CANCEL_ASYNCHRONOUS, THR_BOUND, THR_NEW_LWP, THR_DETACHED,
// THR_SUSPENDED, THR_DAEMON, THR_JOINABLE, THR_SCHED_FIFO,
// THR_SCHED_RR, THR_SCHED_DEFAULT
// = END<INDENT>
//
// By default, or if <priority> is set to
// ACE_DEFAULT_THREAD_PRIORITY, an "appropriate" priority value for
// the given scheduling policy (specified in <flags}>, e.g.,
// <THR_SCHED_DEFAULT>) is used. This value is calculated
// dynamically, and is the median value between the minimum and
// maximum priority values for the given policy. If an explicit
// value is given, it is used. Note that actual priority values are
// EXTREMEMLY implementation-dependent, and are probably best
// avoided.
//
// Note that <thread_adapter> is always deleted by <thr_create>,
// therefore it must be allocated with global operator new.
static int spawn_n (size_t n,
ACE_THR_FUNC func,
void *arg = 0,
long flags = THR_NEW_LWP | THR_JOINABLE,
long priority = ACE_DEFAULT_THREAD_PRIORITY,
void *stack[] = 0,
size_t stack_size[] = 0,
ACE_Thread_Adapter *thread_adapter = 0);
// Spawn N new threads, which execute <func> with argument <arg> (if
// <thread_adapter> is non-0 then <func> and <args> are ignored and
// are obtained from <thread_adapter>). 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. Likewise, if <stack_size>
// != 0 it is assumed to be an array of <n> values indicating how
// big each of the corresponding <stack>s are. Returns the number
// of threads actually spawned (if this doesn't equal the number
// requested then something has gone wrong and <errno> will
// explain...).
//
// See also <spawn>.
static 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,
void *stack[] = 0,
size_t stack_size[] = 0,
ACE_hthread_t thread_handles[] = 0,
ACE_Thread_Adapter *thread_adapter = 0);
// Spawn <n> new threads, which execute <func> with argument <arg>
// (if <thread_adapter> is non-0 then <func> and <args> are ignored
// and are obtained from <thread_adapter>). 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. Returns
// the number of threads actually spawned (if this doesn't equal the
// number requested then something has gone wrong and <errno> will
// explain...).
//
// See also <spawn>.
static int join (ACE_thread_t,
ACE_thread_t *,
void **status = 0);
// Wait for one or more threads to exit.
static int join (ACE_hthread_t,
void ** = 0);
// Wait for one thread to exit.
static int resume (ACE_hthread_t);
// Continue the execution of a previously suspended thread.
static int suspend (ACE_hthread_t);
// Suspend the execution of a particular thread.
static int getprio (ACE_hthread_t, int &prio);
// Get the priority of a particular thread.
static int setprio (ACE_hthread_t, int prio);
// Set the priority of a particular thread.
static int kill (ACE_thread_t, int signum);
// Send a signal to the thread.
static void yield (void);
// Yield the thread to another.
static void self (ACE_hthread_t &t_handle);
// Return the unique kernel handle of the thread. Note that on
// Win32 this is actually a pseudohandle, which cannot be shared
// with other processes or waited on by threads. To locate the real
// handle, please use the <ACE_Thread_Manager::thr_self> method.
static ACE_thread_t self (void);
// Return the unique ID of the thread.
static void exit (void *status = 0);
// Exit the current thread and return "status".
// Should _not_ be called by main thread.
static int getconcurrency (void);
// Get the LWP concurrency level of the process.
static int setconcurrency (int new_level);
// Set the LWP concurrency level of the process.
static int sigsetmask (int how,
const sigset_t *sigset,
sigset_t *osigset = 0);
// Change and/or examine calling thread's signal mask.
static int keycreate (ACE_thread_key_t *keyp,
#if defined (ACE_HAS_THR_C_DEST)
ACE_THR_C_DEST destructor,
#else
ACE_THR_DEST destructor,
#endif /* ACE_HAS_THR_C_DEST */
void * = 0);
// Allocates a <keyp> that is used to identify data that is specific
// to each thread in the process. The key is global to all threads
// in the process.
static int keyfree (ACE_thread_key_t key);
// Free up the key so that other threads can reuse it.
static int setspecific (ACE_thread_key_t key,
void *value);
// Bind value to the thread-specific data key, <key>, for the calling
// thread.
static int getspecific (ACE_thread_key_t key,
void **valuep);
// Stores the current value bound to <key> for the calling thread
// into the location pointed to by <valuep>.
static int disablecancel (struct cancel_state *old_state);
// Disable thread cancellation.
static int enablecancel (struct cancel_state *old_state,
int flag);
// Enable thread cancellation.
static int setcancelstate (struct cancel_state &new_state,
struct cancel_state *old_state);
// Set the cancellation state.
static int cancel (ACE_thread_t t_id);
// Cancel a thread. Note that this method is only portable on
// platforms, such as POSIX pthreads, that support thread
// cancellation.
static void testcancel (void);
// Test the cancel.
private:
ACE_Thread (void);
// Ensure that we don't get instantiated.
};
#if defined (__ACE_INLINE__)
#include "ace/Thread.i"
#endif /* __ACE_INLINE__ */
#include "ace/post.h"
#endif /* ACE_THREAD_H */
|
