diff options
Diffstat (limited to 'lib/qpthreads.c')
| -rw-r--r-- | lib/qpthreads.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/lib/qpthreads.c b/lib/qpthreads.c index 1bfb4ddc..94ec37c0 100644 --- a/lib/qpthreads.c +++ b/lib/qpthreads.c @@ -19,11 +19,20 @@ * Boston, MA 02111-1307, USA. */ +/* This MUST come first... otherwise we don't get __USE_UNIX98, which is */ +/* essential if glibc is to allow pthread_mutexattr_settype() to be used. */ +#include "config.h" + #include <signal.h> #include "qpthreads.h" #include "memory.h" +/* If this is not set, will get errors later. */ +#ifndef __USE_UNIX98 +#error "_USE_UNIX98 not defined" +#endif + /*============================================================================== * Quagga Pthread Interface -- qpt_xxxx * @@ -41,6 +50,61 @@ * * the ability to add any work-arounds which may be required if poorly * conforming pthreads implementations are encountered * + * Pthread Requirements + * ==================== + * + * This is assuming support for 1003.1-2004 -- XOPEN Issue 6, with [THR] and + * [XSI] options. + * + * The [XSI] is required for pthread_mutexattr_settype(), only. + * + * If qpt_thread_attr_init() uses: + * + * pthread_attr_getinheritsched()/_setinheritshed() [TPS] + * pthread_attr_getscope()/_setscope() [TPS] + * pthread_attr_getschedpolicy()/_setschedpolicy() [TPS] + * pthread_attr_getschedparam()/_setschedparam() [THR] + * + * but they are only required if explicit scheduling attributes are being set. + * (So, could be dropped where not supported.) + * + * Amongst the things which are NOT required: + * + * pthread_attr_getguardsize()/_setguardsize() [XSI] + * pthread_attr_getstack()/_setstack() [TSA TSS] + * pthread_attr_getstackaddr()/_setstackaddr() [TSA OB] + * pthread_attr_getstacksize()/_setstacksize() [TSA TSS] + * + * pthread_barrier_xxx() [BAR] + * + * pthread_condattr_getpshared()/_setpshared() [TSH] + * + * pthread_mutex_getprioceiling()/_setprioceiling() [TPP] + * pthread_mutex_timedlock() [TMO] pro tem + * pthread_mutexattr_getprioceiling()/_setprioceiling() [TPP] + * pthread_mutexattr_getprotocol()/_setprotocol() [TPP TPI] + * pthread_mutexattr_getpshared()/_setpshared() [TSH] + * + * pthread_rwlock_xxx() [THR] pro tem + * pthread_rwlockattr_init()/_destroy() [THR] pro tem + * pthread_rwlockattr_getpshared()/_setpshared() [TSH] + * + * pthread_spin_xxx() [SPI] + * + * [CS] (Clock Select) is assumed if HAVE_CLOCK_MONOTONIC. + * + * In 1003.1-2008, XOPEN issue 7, [THR] and pthread_mutexattr_settype() have + * been moved to Base. + * + * NB: it is essential that pthread_kill() delivers the signal to the target + * thread only -- ie, it must be POSIX compliant. That rules out the old + * (2.4) LinuxThreads. For Linux, 2.6 (or greater) is required, with + * NPTL (these days generally included in glibc). + * + * NB: for glibc to give all the required features, either _GNU_SOURCE or + * _XOPEN_SOURCE must be set *before* the first #include <features.h>. + * _XOPEN_SOURCE=600 is sufficient. + * * Pthread Thread Attributes -- Scheduling * ======================================= * |