libeio/xthread.h

#ifndef XTHREAD_H_
#define XTHREAD_H_

/* whether word reads are potentially non-atomic.
 * this is conservative, likely most arches this runs
 * on have atomic word read/writes.
 */
#ifndef WORDACCESS_UNSAFE
# if __i386 || __x86_64
#  define WORDACCESS_UNSAFE 0
# else
#  define WORDACCESS_UNSAFE 1
# endif
#endif

/////////////////////////////////////////////////////////////////////////////

#ifdef _WIN32

//#define NTDDI_VERSION NTDDI_WIN2K // needed to get win2000 api calls, fails with mingw
#if _WIN32_WINNT < 0x400
# define _WIN32_WINNT 0x400 // maybe working alternative for mingw
#endif
#include <stdio.h>//D
#include <fcntl.h>
#include <io.h>
#include <time.h>
#include <winsock2.h>
#include <process.h>
#include <windows.h>

/* work around some bugs in ptw32 */
#if defined(__MINGW32__) && defined(_TIMESPEC_DEFINED)
#define HAVE_STRUCT_TIMESPEC 1
#endif

#include <pthread.h>
#ifndef pthread_sigmask
# define sigset_t int
# define sigfillset(a)
# define pthread_sigmask(a,b,c)
# define sigaddset(a,b)
# define sigemptyset(s)
#endif

typedef pthread_mutex_t xmutex_t;
#define X_MUTEX_INIT           PTHREAD_MUTEX_INITIALIZER
#define X_MUTEX_CREATE(mutex)  pthread_mutex_init (&(mutex), 0)
#define X_LOCK(mutex)          pthread_mutex_lock (&(mutex))
#define X_UNLOCK(mutex)        pthread_mutex_unlock (&(mutex))

typedef pthread_cond_t xcond_t;
#define X_COND_INIT                     PTHREAD_COND_INITIALIZER
#define X_COND_CREATE(cond)             pthread_cond_init (&(cond), 0)
#define X_COND_SIGNAL(cond)             pthread_cond_signal (&(cond))
#define X_COND_WAIT(cond,mutex)         pthread_cond_wait (&(cond), &(mutex))
#define X_COND_TIMEDWAIT(cond,mutex,to) pthread_cond_timedwait (&(cond), &(mutex), &(to))

typedef pthread_t xthread_t;
#define X_THREAD_PROC(name) static void *name (void *thr_arg)
#define X_THREAD_ATFORK(a,b,c)

static int
xthread_create (xthread_t *tid, void *(*proc)(void *), void *arg)
{
  int retval;
#if 0
  pthread_attr_t attr;

  pthread_attr_init (&attr);
  pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);

  retval = pthread_create (tid, &attr, proc, arg) == 0;

  pthread_attr_destroy (&attr);
#else
  retval = pthread_create (tid, 0, proc, arg) == 0;

  if (retval)
    pthread_detach (*tid);
#endif

  return retval;
}

#define respipe_read(a,b,c)  PerlSock_recv ((a), (b), (c), 0)
#define respipe_write(a,b,c) send ((a), (b), (c), 0)
#define respipe_close(a)     PerlSock_closesocket ((a))

#else
/////////////////////////////////////////////////////////////////////////////

#if __linux && !defined(_GNU_SOURCE)
# define _GNU_SOURCE
#endif

/* just in case */
#define _REENTRANT 1

#if __solaris
# define _POSIX_PTHREAD_SEMANTICS 1
/* try to bribe solaris headers into providing a current pthread API
 * despite environment being configured for an older version.
 */
# define __EXTENSIONS__ 1
#endif

#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <limits.h>
#include <pthread.h>

typedef pthread_mutex_t xmutex_t;
#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
# define X_MUTEX_INIT           PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
# define X_MUTEX_CREATE(mutex)                                          \
  do {                                                                  \
    pthread_mutexattr_t attr;                                           \
    pthread_mutexattr_init (&attr);                                     \
    pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_ADAPTIVE_NP);       \
    pthread_mutex_init (&(mutex), &attr);                               \
  } while (0)
#else
# define X_MUTEX_INIT           PTHREAD_MUTEX_INITIALIZER
# define X_MUTEX_CREATE(mutex)  pthread_mutex_init (&(mutex), 0)
#endif
#define X_LOCK(mutex)           pthread_mutex_lock   (&(mutex))
#define X_UNLOCK(mutex)         pthread_mutex_unlock (&(mutex))

typedef pthread_cond_t xcond_t;
#define X_COND_INIT                     PTHREAD_COND_INITIALIZER
#define X_COND_CREATE(cond)             pthread_cond_init (&(cond), 0)
#define X_COND_SIGNAL(cond)             pthread_cond_signal (&(cond))
#define X_COND_WAIT(cond,mutex)         pthread_cond_wait (&(cond), &(mutex))
#define X_COND_TIMEDWAIT(cond,mutex,to) pthread_cond_timedwait (&(cond), &(mutex), &(to))

typedef pthread_t xthread_t;
#define X_THREAD_PROC(name) static void *name (void *thr_arg)
#define X_THREAD_ATFORK(prepare,parent,child) pthread_atfork (prepare, parent, child)

// the broken bsd's once more
#ifndef PTHREAD_STACK_MIN
# define PTHREAD_STACK_MIN 0
#endif

#ifndef X_STACKSIZE
# define X_STACKSIZE sizeof (void *) * 4096
#endif

static int
xthread_create (xthread_t *tid, void *(*proc)(void *), void *arg)
{
  int retval;
  sigset_t fullsigset, oldsigset;
  pthread_attr_t attr;

  pthread_attr_init (&attr);
  pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
  pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN < X_STACKSIZE ? X_STACKSIZE : PTHREAD_STACK_MIN);
#ifdef PTHREAD_SCOPE_PROCESS
  pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
#endif

  sigfillset (&fullsigset);

  pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
  retval = pthread_create (tid, &attr, proc, arg) == 0;
  pthread_sigmask (SIG_SETMASK, &oldsigset, 0);

  pthread_attr_destroy (&attr);

  return retval;
}

#define respipe_read(a,b,c)  read  ((a), (b), (c))
#define respipe_write(a,b,c) write ((a), (b), (c))
#define respipe_close(a)     close ((a))

#endif

#if __linux && __GNUC__ >= 4 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 3 && 0 /* also check arch */
/* __thread has little to no advantage over pthread_* in most configurations, so this is not used */
# define X_TLS_DECLARE(varname)   __thread void *varname
# define X_TLS_INIT(varname)      
# define X_TLS_SET(varname,value) varname = (value)
# define X_TLS_GET(varname)       varname
#else
# define X_TLS_DECLARE(varname)   pthread_key_t varname
# define X_TLS_INIT(varname)      do { if (pthread_key_create (&(varname), 0)) abort (); } while (0)
# define X_TLS_SET(varname,value) pthread_setspecific (varname, (value))
# define X_TLS_GET(varname)       pthread_getspecific (varname)
#endif

#endif

Revision:	1.19
Committed:	Tue Aug 14 09:29:50 2018 UTC (5 years, 9 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-4_6, rel-4_7, rel-4_81, rel-4_80, rel-4_53, rel-4_78, rel-4_79, rel-4_54, rel-4_74, rel-4_75, rel-4_76, rel-4_77, rel-4_71, rel-4_72, rel-4_73, HEAD
Changes since 1.18:	+17 -6 lines
Log Message:	4.53
#	User	Rev	Content
1	root	1.1	#ifndef XTHREAD_H_
2			#define XTHREAD_H_
3
4			/* whether word reads are potentially non-atomic.
5	sf-exg	1.11	* this is conservative, likely most arches this runs
6	root	1.1	* on have atomic word read/writes.
7			*/
8			#ifndef WORDACCESS_UNSAFE
9			# if __i386 \|\| __x86_64
10			# define WORDACCESS_UNSAFE 0
11			# else
12			# define WORDACCESS_UNSAFE 1
13			# endif
14			#endif
15
16			/////////////////////////////////////////////////////////////////////////////
17
18			#ifdef _WIN32
19
20	root	1.17	//#define NTDDI_VERSION NTDDI_WIN2K // needed to get win2000 api calls, fails with mingw
21	root	1.19	#if _WIN32_WINNT < 0x400
22			# define _WIN32_WINNT 0x400 // maybe working alternative for mingw
23			#endif
24	root	1.1	#include <stdio.h>//D
25			#include <fcntl.h>
26			#include <io.h>
27			#include <time.h>
28			#include <winsock2.h>
29			#include <process.h>
30			#include <windows.h>
31	root	1.17
32			/* work around some bugs in ptw32 */
33			#if defined(__MINGW32__) && defined(_TIMESPEC_DEFINED)
34			#define HAVE_STRUCT_TIMESPEC 1
35			#endif
36
37	root	1.1	#include <pthread.h>
38	root	1.19	#ifndef pthread_sigmask
39			# define sigset_t int
40			# define sigfillset(a)
41			# define pthread_sigmask(a,b,c)
42			# define sigaddset(a,b)
43			# define sigemptyset(s)
44			#endif
45	root	1.1
46	root	1.8	typedef pthread_mutex_t xmutex_t;
47	root	1.1	#define X_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
48	root	1.10	#define X_MUTEX_CREATE(mutex) pthread_mutex_init (&(mutex), 0)
49	root	1.1	#define X_LOCK(mutex) pthread_mutex_lock (&(mutex))
50			#define X_UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
51
52	root	1.8	typedef pthread_cond_t xcond_t;
53	root	1.1	#define X_COND_INIT PTHREAD_COND_INITIALIZER
54	root	1.10	#define X_COND_CREATE(cond) pthread_cond_init (&(cond), 0)
55	root	1.1	#define X_COND_SIGNAL(cond) pthread_cond_signal (&(cond))
56			#define X_COND_WAIT(cond,mutex) pthread_cond_wait (&(cond), &(mutex))
57			#define X_COND_TIMEDWAIT(cond,mutex,to) pthread_cond_timedwait (&(cond), &(mutex), &(to))
58
59	root	1.8	typedef pthread_t xthread_t;
60	root	1.15	#define X_THREAD_PROC(name) static void name (void thr_arg)
61	root	1.1	#define X_THREAD_ATFORK(a,b,c)
62
63			static int
64	root	1.16	xthread_create (xthread_t tid, void (proc)(void ), void *arg)
65	root	1.1	{
66	root	1.3	int retval;
67	root	1.19	#if 0
68	root	1.1	pthread_attr_t attr;
69
70			pthread_attr_init (&attr);
71			pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
72
73	root	1.3	retval = pthread_create (tid, &attr, proc, arg) == 0;
74	root	1.2
75			pthread_attr_destroy (&attr);
76	root	1.19	#else
77			retval = pthread_create (tid, 0, proc, arg) == 0;
78
79			if (retval)
80			pthread_detach (*tid);
81			#endif
82	root	1.2
83	root	1.3	return retval;
84	root	1.1	}
85
86			#define respipe_read(a,b,c) PerlSock_recv ((a), (b), (c), 0)
87			#define respipe_write(a,b,c) send ((a), (b), (c), 0)
88			#define respipe_close(a) PerlSock_closesocket ((a))
89
90			#else
91			/////////////////////////////////////////////////////////////////////////////
92
93			#if __linux && !defined(_GNU_SOURCE)
94			# define _GNU_SOURCE
95			#endif
96
97			/* just in case */
98			#define _REENTRANT 1
99
100			#if __solaris
101			# define _POSIX_PTHREAD_SEMANTICS 1
102			/* try to bribe solaris headers into providing a current pthread API
103			* despite environment being configured for an older version.
104			*/
105			# define __EXTENSIONS__ 1
106			#endif
107
108			#include <unistd.h>
109			#include <fcntl.h>
110			#include <signal.h>
111			#include <limits.h>
112			#include <pthread.h>
113
114	root	1.8	typedef pthread_mutex_t xmutex_t;
115	root	1.1	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
116	root	1.10	# define X_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
117			# define X_MUTEX_CREATE(mutex) \
118			do { \
119			pthread_mutexattr_t attr; \
120			pthread_mutexattr_init (&attr); \
121			pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_ADAPTIVE_NP); \
122			pthread_mutex_init (&(mutex), &attr); \
123			} while (0)
124	root	1.1	#else
125	root	1.10	# define X_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
126			# define X_MUTEX_CREATE(mutex) pthread_mutex_init (&(mutex), 0)
127	root	1.1	#endif
128	root	1.10	#define X_LOCK(mutex) pthread_mutex_lock (&(mutex))
129			#define X_UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
130	root	1.1
131	root	1.8	typedef pthread_cond_t xcond_t;
132	root	1.10	#define X_COND_INIT PTHREAD_COND_INITIALIZER
133			#define X_COND_CREATE(cond) pthread_cond_init (&(cond), 0)
134			#define X_COND_SIGNAL(cond) pthread_cond_signal (&(cond))
135			#define X_COND_WAIT(cond,mutex) pthread_cond_wait (&(cond), &(mutex))
136			#define X_COND_TIMEDWAIT(cond,mutex,to) pthread_cond_timedwait (&(cond), &(mutex), &(to))
137	root	1.1
138	root	1.8	typedef pthread_t xthread_t;
139	root	1.1	#define X_THREAD_PROC(name) static void name (void thr_arg)
140			#define X_THREAD_ATFORK(prepare,parent,child) pthread_atfork (prepare, parent, child)
141
142	root	1.5	// the broken bsd's once more
143			#ifndef PTHREAD_STACK_MIN
144			# define PTHREAD_STACK_MIN 0
145			#endif
146
147	root	1.7	#ifndef X_STACKSIZE
148	root	1.12	# define X_STACKSIZE sizeof (void ) 4096
149	root	1.6	#endif
150
151	root	1.1	static int
152	root	1.16	xthread_create (xthread_t tid, void (proc)(void ), void *arg)
153	root	1.1	{
154			int retval;
155			sigset_t fullsigset, oldsigset;
156			pthread_attr_t attr;
157
158			pthread_attr_init (&attr);
159			pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
160	root	1.7	pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN < X_STACKSIZE ? X_STACKSIZE : PTHREAD_STACK_MIN);
161	root	1.1	#ifdef PTHREAD_SCOPE_PROCESS
162			pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
163			#endif
164
165			sigfillset (&fullsigset);
166
167			pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
168			retval = pthread_create (tid, &attr, proc, arg) == 0;
169			pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
170
171	root	1.2	pthread_attr_destroy (&attr);
172
173	root	1.1	return retval;
174			}
175
176			#define respipe_read(a,b,c) read ((a), (b), (c))
177			#define respipe_write(a,b,c) write ((a), (b), (c))
178			#define respipe_close(a) close ((a))
179
180			#endif
181
182	root	1.18	#if __linux && __GNUC__ >= 4 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 3 && 0 /* also check arch */
183			/* __thread has little to no advantage over pthread_* in most configurations, so this is not used */
184			# define X_TLS_DECLARE(varname) __thread void *varname
185			# define X_TLS_INIT(varname)
186			# define X_TLS_SET(varname,value) varname = (value)
187			# define X_TLS_GET(varname) varname
188			#else
189			# define X_TLS_DECLARE(varname) pthread_key_t varname
190			# define X_TLS_INIT(varname) do { if (pthread_key_create (&(varname), 0)) abort (); } while (0)
191			# define X_TLS_SET(varname,value) pthread_setspecific (varname, (value))
192			# define X_TLS_GET(varname) pthread_getspecific (varname)
193			#endif
194
195	root	1.1	#endif
196