|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
1 |
/* Copyright (C) 2006 MySQL AB
|
2 |
||
3 |
This program is free software; you can redistribute it and/or modify
|
|
4 |
it under the terms of the GNU General Public License as published by
|
|
5 |
the Free Software Foundation; version 2 of the License.
|
|
6 |
||
7 |
This program is distributed in the hope that it will be useful,
|
|
8 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
9 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
10 |
GNU General Public License for more details.
|
|
11 |
||
12 |
You should have received a copy of the GNU General Public License
|
|
13 |
along with this program; if not, write to the Free Software
|
|
14 |
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
|
|
15 |
||
|
1241.9.36
by Monty Taylor
ZOMG. I deleted drizzled/server_includes.h. |
16 |
#include "config.h" |
|
1152.1.5
by Brian Aker
Remove Factory/make scheduler work like everything else. |
17 |
#include <plugin/multi_thread/multi_thread.h> |
|
1241.9.31
by Monty Taylor
Moved global pthread variables into their own header. |
18 |
#include "drizzled/pthread_globals.h" |
|
960.1.2
by Monty Taylor
Moved pthread_attrib into multi_thread class. |
19 |
|
|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
20 |
using namespace std; |
|
971.3.64
by Eric Day
Cleaned up Scheduler plugin, moved more code to the schedular plugins, reworked some functions to be methods in Session, removed some dead code. |
21 |
using namespace drizzled; |
|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
22 |
|
|
971.3.64
by Eric Day
Cleaned up Scheduler plugin, moved more code to the schedular plugins, reworked some functions to be methods in Session, removed some dead code. |
23 |
/* Configuration variables. */
|
|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
24 |
static uint32_t max_threads; |
25 |
||
|
1152.1.5
by Brian Aker
Remove Factory/make scheduler work like everything else. |
26 |
/* Global's (TBR) */
|
27 |
static MultiThreadScheduler *scheduler= NULL; |
|
28 |
||
|
971.3.64
by Eric Day
Cleaned up Scheduler plugin, moved more code to the schedular plugins, reworked some functions to be methods in Session, removed some dead code. |
29 |
/**
|
30 |
* Function to be run as a thread for each session.
|
|
31 |
*/
|
|
|
971.3.67
by Eric Day
Switched static funtion to anonymous namespace + extern C for Sun CC. |
32 |
namespace
|
33 |
{
|
|
34 |
extern "C" pthread_handler_t session_thread(void *arg); |
|
35 |
}
|
|
|
971.3.64
by Eric Day
Cleaned up Scheduler plugin, moved more code to the schedular plugins, reworked some functions to be methods in Session, removed some dead code. |
36 |
|
|
971.3.67
by Eric Day
Switched static funtion to anonymous namespace + extern C for Sun CC. |
37 |
namespace
|
|
971.3.64
by Eric Day
Cleaned up Scheduler plugin, moved more code to the schedular plugins, reworked some functions to be methods in Session, removed some dead code. |
38 |
{
|
|
971.3.67
by Eric Day
Switched static funtion to anonymous namespace + extern C for Sun CC. |
39 |
extern "C" pthread_handler_t session_thread(void *arg) |
40 |
{
|
|
41 |
Session *session= static_cast<Session*>(arg); |
|
|
1152.1.7
by Brian Aker
Fix for shadow issues. |
42 |
MultiThreadScheduler *sched= static_cast<MultiThreadScheduler*>(session->scheduler); |
43 |
sched->runSession(session); |
|
|
971.3.67
by Eric Day
Switched static funtion to anonymous namespace + extern C for Sun CC. |
44 |
return NULL; |
45 |
}
|
|
|
971.3.64
by Eric Day
Cleaned up Scheduler plugin, moved more code to the schedular plugins, reworked some functions to be methods in Session, removed some dead code. |
46 |
}
|
47 |
||
|
1152.1.5
by Brian Aker
Remove Factory/make scheduler work like everything else. |
48 |
|
49 |
bool MultiThreadScheduler::addSession(Session *session) |
|
50 |
{
|
|
51 |
if (thread_count >= max_threads) |
|
52 |
return true; |
|
53 |
||
|
1260.1.2
by Monty Taylor
Replaced operator overloads with methods since we can't actually usefully follow the proper semantics for the operators. |
54 |
thread_count.increment(); |
|
1152.1.5
by Brian Aker
Remove Factory/make scheduler work like everything else. |
55 |
|
56 |
if (pthread_create(&session->real_id, &attr, session_thread, |
|
57 |
static_cast<void*>(session))) |
|
58 |
{
|
|
|
1260.1.2
by Monty Taylor
Replaced operator overloads with methods since we can't actually usefully follow the proper semantics for the operators. |
59 |
thread_count.decrement(); |
|
1152.1.5
by Brian Aker
Remove Factory/make scheduler work like everything else. |
60 |
return true; |
61 |
}
|
|
62 |
||
63 |
return false; |
|
64 |
}
|
|
65 |
||
66 |
||
67 |
void MultiThreadScheduler::killSessionNow(Session *session) |
|
68 |
{
|
|
69 |
/* Locks LOCK_thread_count and deletes session */
|
|
|
1241.9.12
by Monty Taylor
Trims more out of server_includes.h. |
70 |
Session::unlink(session); |
|
1260.1.2
by Monty Taylor
Replaced operator overloads with methods since we can't actually usefully follow the proper semantics for the operators. |
71 |
thread_count.decrement(); |
|
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
72 |
internal::my_thread_end(); |
|
1152.1.5
by Brian Aker
Remove Factory/make scheduler work like everything else. |
73 |
pthread_exit(0); |
74 |
/* We should never reach this point. */
|
|
75 |
}
|
|
76 |
||
77 |
MultiThreadScheduler::~MultiThreadScheduler() |
|
78 |
{
|
|
79 |
(void) pthread_mutex_lock(&LOCK_thread_count); |
|
80 |
while (thread_count) |
|
81 |
{
|
|
82 |
pthread_cond_wait(&COND_thread_count, &LOCK_thread_count); |
|
83 |
}
|
|
84 |
||
85 |
(void) pthread_mutex_unlock(&LOCK_thread_count); |
|
86 |
(void) pthread_attr_destroy(&attr); |
|
87 |
}
|
|
88 |
||
89 |
||
|
1110.1.5
by Monty Taylor
Renamed PluginRegistry to plugin::Registry. |
90 |
static int init(drizzled::plugin::Registry ®istry) |
|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
91 |
{
|
|
1152.1.5
by Brian Aker
Remove Factory/make scheduler work like everything else. |
92 |
scheduler= new MultiThreadScheduler("multi_thread"); |
93 |
registry.add(scheduler); |
|
94 |
||
|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
95 |
return 0; |
96 |
}
|
|
97 |
||
|
1110.1.5
by Monty Taylor
Renamed PluginRegistry to plugin::Registry. |
98 |
static int deinit(drizzled::plugin::Registry ®istry) |
|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
99 |
{
|
|
1152.1.5
by Brian Aker
Remove Factory/make scheduler work like everything else. |
100 |
registry.remove(scheduler); |
101 |
delete scheduler; |
|
102 |
||
|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
103 |
return 0; |
104 |
}
|
|
105 |
||
106 |
static DRIZZLE_SYSVAR_UINT(max_threads, max_threads, |
|
107 |
PLUGIN_VAR_RQCMDARG, |
|
108 |
N_("Maximum number of user threads available."), |
|
|
971.3.64
by Eric Day
Cleaned up Scheduler plugin, moved more code to the schedular plugins, reworked some functions to be methods in Session, removed some dead code. |
109 |
NULL, NULL, 2048, 1, 4096, 0); |
|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
110 |
|
|
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
111 |
static drizzle_sys_var* sys_variables[]= { |
|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
112 |
DRIZZLE_SYSVAR(max_threads), |
113 |
NULL
|
|
114 |
};
|
|
115 |
||
|
1228.1.5
by Monty Taylor
Merged in some naming things. |
116 |
DRIZZLE_DECLARE_PLUGIN
|
|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
117 |
{
|
|
1241.10.2
by Monty Taylor
Added support for embedding the drizzle version number in the plugin file. |
118 |
DRIZZLE_VERSION_ID, |
|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
119 |
"multi_thread", |
120 |
"0.1", |
|
121 |
"Brian Aker", |
|
|
960.1.1
by Monty Taylor
First pass at scheduler plugin. |
122 |
"One Thread Per Session Scheduler", |
|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
123 |
PLUGIN_LICENSE_GPL, |
124 |
init, /* Plugin Init */ |
|
125 |
deinit, /* Plugin Deinit */ |
|
126 |
NULL, /* status variables */ |
|
|
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
127 |
sys_variables, /* system variables */ |
|
868
by Brian Aker
Adding Multi-threaded Scheduler into the system. |
128 |
NULL /* config options */ |
129 |
}
|
|
|
1228.1.5
by Monty Taylor
Merged in some naming things. |
130 |
DRIZZLE_DECLARE_PLUGIN_END; |