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xthread.h
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xthread.h
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#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