12
12
You should have received a copy of the GNU General Public License
13
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 */
14
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
16
16
/* Defines to make different thread packages compatible */
20
#ifndef DRIZZLED_INTERNAL_MY_PTHREAD_H
21
#define DRIZZLED_INTERNAL_MY_PTHREAD_H
23
22
#include <unistd.h>
25
#include <boost/date_time.hpp>
25
#if !defined(__cplusplus)
28
30
#define ETIME ETIMEDOUT /* For FreeBSD */
34
#define EXTERNC extern "C"
38
#endif /* __cplusplus */
31
40
#include <pthread.h>
42
#include "drizzled/visibility.h"
49
51
#define pthread_key(T,V) pthread_key_t V
52
#define pthread_detach_this_thread()
50
53
#define pthread_handler_t void *
51
54
typedef void *(* pthread_handler)(void *);
56
#if defined(HAVE_SIGTHREADMASK) && !defined(HAVE_PTHREAD_SIGMASK)
57
#define pthread_sigmask(A,B,C) sigthreadmask((A),(B),(C))
62
We define my_sigset() and use that instead of the system sigset() so that
63
we can favor an implementation based on sigaction(). On some systems, such
64
as Mac OS X, sigset() results in flags such as SA_RESTART being set, and
65
we want to make sure that no such flags are set.
67
#if defined(HAVE_SIGACTION) && !defined(my_sigset)
68
#define my_sigset(A,B) do { struct sigaction l_s; sigset_t l_set; int l_rc; \
70
sigemptyset(&l_set); \
71
l_s.sa_handler = (B); \
72
l_s.sa_mask = l_set; \
74
l_rc= sigaction((A), &l_s, (struct sigaction *) NULL);\
77
#elif defined(HAVE_SIGSET) && !defined(my_sigset)
78
#define my_sigset(A,B) sigset((A),(B))
79
#elif !defined(my_sigset)
80
#define my_sigset(A,B) signal((A),(B))
83
#ifndef my_pthread_attr_setprio
84
#ifdef HAVE_PTHREAD_ATTR_SETPRIO
85
#define my_pthread_attr_setprio(A,B) pthread_attr_setprio((A),(B))
87
extern void my_pthread_attr_setprio(pthread_attr_t *attr, int priority);
91
#define HAVE_PTHREAD_KILL
53
93
#if !defined(HAVE_PTHREAD_YIELD_ONE_ARG) && !defined(HAVE_PTHREAD_YIELD_ZERO_ARG)
54
94
/* no pthread_yield() available */
55
95
#ifdef HAVE_SCHED_YIELD
76
133
#ifndef set_timespec_nsec
77
134
#define set_timespec_nsec(ABSTIME,NSEC) \
79
boost::posix_time::ptime mytime(boost::posix_time::microsec_clock::local_time());\
80
boost::posix_time::ptime epoch(boost::gregorian::date(1970,1,1));\
81
uint64_t t_mark= (mytime-epoch).total_microseconds();\
82
uint64_t now= t_mark + (NSEC/100); \
136
uint64_t now= my_getsystime() + (NSEC/100); \
83
137
(ABSTIME).tv_sec= (time_t) (now / 10000000UL); \
84
138
(ABSTIME).tv_nsec= (long) (now % 10000000UL * 100 + ((NSEC) % 100)); \
86
140
#endif /* !set_timespec_nsec */
141
#endif /* HAVE_TIMESPEC_TS_SEC */
143
/* safe_mutex adds checking to mutex for easier debugging */
145
typedef struct st_safe_mutex_t
147
pthread_mutex_t global,mutex;
153
int safe_mutex_init(safe_mutex_t *mp, const pthread_mutexattr_t *attr,
154
const char *file, uint32_t line);
155
int safe_mutex_lock(safe_mutex_t *mp, bool try_lock, const char *file, uint32_t line);
156
int safe_mutex_unlock(safe_mutex_t *mp,const char *file, uint32_t line);
157
int safe_mutex_destroy(safe_mutex_t *mp,const char *file, uint32_t line);
158
int safe_cond_wait(pthread_cond_t *cond, safe_mutex_t *mp,const char *file,
160
int safe_cond_timedwait(pthread_cond_t *cond, safe_mutex_t *mp,
161
struct timespec *abstime, const char *file, uint32_t line);
162
void safe_mutex_global_init(void);
163
void safe_mutex_end(void);
88
165
/* Wrappers if safe mutex is actually used */
89
166
#define safe_mutex_assert_owner(mp)
92
169
/* READ-WRITE thread locking */
171
#ifndef HAVE_THR_SETCONCURRENCY
172
#define thr_setconcurrency(A) pthread_dummy(0)
94
174
#if !defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE) && ! defined(pthread_attr_setstacksize)
95
175
#define pthread_attr_setstacksize(A,B) pthread_dummy(0)
98
178
/* Define mutex types, see my_thr_init.c */
99
#ifdef THREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
179
#define MY_MUTEX_INIT_SLOW NULL
180
#ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
100
181
extern pthread_mutexattr_t my_fast_mutexattr;
101
182
#define MY_MUTEX_INIT_FAST &my_fast_mutexattr
103
184
#define MY_MUTEX_INIT_FAST NULL
186
#ifdef PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP
187
extern pthread_mutexattr_t my_errorcheck_mutexattr;
188
#define MY_MUTEX_INIT_ERRCHK &my_errorcheck_mutexattr
190
#define MY_MUTEX_INIT_ERRCHK NULL
107
194
/* Define it to something */
198
typedef uint64_t my_thread_id;
111
200
extern bool my_thread_global_init(void);
112
201
extern void my_thread_global_end(void);
113
DRIZZLED_API bool my_thread_init(void);
114
DRIZZLED_API void my_thread_end(void);
202
extern bool my_thread_init(void);
203
extern void my_thread_end(void);
115
204
extern const char *my_thread_name(void);
205
extern my_thread_id my_thread_dbug_id(void);
117
207
/* All thread specific variables are in the following struct */
120
A default thread stack size of zero means that we are going to use
121
the OS defined thread stack size (this varies from OS to OS).
123
#define DEFAULT_THREAD_STACK 0
125
} /* namespace internal */
126
} /* namespace drizzled */
128
#endif /* DRIZZLED_INTERNAL_MY_PTHREAD_H */
209
#define THREAD_NAME_SIZE 10
211
Drizzle can survive with 32K, but some glibc libraries require > 128K stack
212
to resolve hostnames. Also recursive stored procedures needs stack.
214
#define DEFAULT_THREAD_STACK (256*INT32_C(1024))
216
struct st_my_thread_var
218
pthread_cond_t suspend;
219
pthread_mutex_t mutex;
220
pthread_mutex_t * volatile current_mutex;
221
pthread_cond_t * volatile current_cond;
222
pthread_t pthread_self;
227
struct st_my_thread_var *next,**prev;
231
extern struct st_my_thread_var *_my_thread_var(void);
232
extern uint32_t my_thread_end_wait_time;
233
#define my_thread_var (_my_thread_var())
235
Keep track of shutdown,signal, and main threads so that my_end() will not
236
report errors with them
239
/* Which kind of thread library is in use */
241
#define THD_LIB_OTHER 1
242
#define THD_LIB_NPTL 2
245
extern uint32_t thd_lib_detected;
248
thread_safe_xxx functions are for critical statistic or counters.
249
The implementation is guaranteed to be thread safe, on all platforms.
250
Note that the calling code should *not* assume the counter is protected
251
by the mutex given, as the implementation of these helpers may change
252
to use my_atomic operations instead.
255
#ifndef thread_safe_increment
256
#define thread_safe_increment(V,L) \
257
(pthread_mutex_lock((L)), (V)++, pthread_mutex_unlock((L)))
258
#define thread_safe_decrement(V,L) \
259
(pthread_mutex_lock((L)), (V)--, pthread_mutex_unlock((L)))
262
#ifndef thread_safe_add
263
#define thread_safe_add(V,C,L) \
264
(pthread_mutex_lock((L)), (V)+=(C), pthread_mutex_unlock((L)))
265
#define thread_safe_sub(V,C,L) \
266
(pthread_mutex_lock((L)), (V)-=(C), pthread_mutex_unlock((L)))
270
statistics_xxx functions are for non critical statistic,
271
maintained in global variables.
272
- race conditions can occur, making the result slightly inaccurate.
273
- the lock given is not honored.
275
#define statistic_decrement(V,L) (V)--
276
#define statistic_increment(V,L) (V)++
277
#define statistic_add(V,C,L) (V)+=(C)
278
#define statistic_sub(V,C,L) (V)-=(C)
281
No locking needed, the counter is owned by the thread
283
#define status_var_increment(V) (V)++
284
#define status_var_decrement(V) (V)--
285
#define status_var_add(V,C) (V)+=(C)
286
#define status_var_sub(V,C) (V)-=(C)
291
#endif /* _my_ptread_h */