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Code

IRIX spinlock patch from James Peach <jpeach@sgi.com>.

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Jeremy.
(This used to be commit 1ae1987a002716e8aa0d4bc0dd68f580ad762e47)
This commit is contained in:
Jeremy Allison 2003-12-09 22:41:26 +00:00
parent f2c6cec339
commit 86d65dc070
2 changed files with 53 additions and 0 deletions
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8
source3/configure.in
View File

@ -2013,6 +2013,14 @@ if test x"$samba_cv_SYSCONF_SC_NGROUPS_MAX" = x"yes"; then
AC_DEFINE(SYSCONF_SC_NGROUPS_MAX,1,[Whether sysconf(_SC_NGROUPS_MAX) is available]) AC_DEFINE(SYSCONF_SC_NGROUPS_MAX,1,[Whether sysconf(_SC_NGROUPS_MAX) is available])
fi fi
AC_CACHE_CHECK([for sysconf(_SC_NPROC_ONLN)],samba_cv_SYSCONF_SC_NPROC_ONLN,[
AC_TRY_RUN([#include <unistd.h>
main() { exit(sysconf(_SC_NPROC_ONLN) == -1 ? 1 : 0); }],
samba_cv_SYSCONF_SC_NPROC_ONLN=yes,samba_cv_SYSCONF_SC_NPROC_ONLN=no,samba_cv_SYSCONF_SC_NPROC_ONLN=cross)])
if test x"$samba_cv_SYSCONF_SC_NPROC_ONLN" = x"yes"; then
AC_DEFINE(SYSCONF_SC_NPROC_ONLN,1,[Whether sysconf(_SC_NPROC_ONLN) is available])
fi
AC_CACHE_CHECK([for root],samba_cv_HAVE_ROOT,[ AC_CACHE_CHECK([for root],samba_cv_HAVE_ROOT,[
AC_TRY_RUN([main() { exit(getuid() != 0); }], AC_TRY_RUN([main() { exit(getuid() != 0); }],
samba_cv_HAVE_ROOT=yes,samba_cv_HAVE_ROOT=no,samba_cv_HAVE_ROOT=cross)]) samba_cv_HAVE_ROOT=yes,samba_cv_HAVE_ROOT=no,samba_cv_HAVE_ROOT=cross)])

45
source3/tdb/spinlock.c
View File

@ -143,6 +143,47 @@ static inline int __spin_is_locked(spinlock_t *lock)
return (*lock != 1); return (*lock != 1);
} }
#elif defined(MIPS_SPINLOCKS) && defined(sgi) && (_COMPILER_VERSION >= 730)
/* Implement spinlocks on IRIX using the MIPSPro atomic fetch operations. See
* sync(3) for the details of the intrinsic operations.
*
* "sgi" and "_COMPILER_VERSION" are always defined by MIPSPro.
*/
#if defined(STANDALONE)
/* MIPSPro 7.3 has "__inline" as an extension, but not "inline. */
#define inline __inline
#endif /* STANDALONE */
/* Returns 0 if the lock is acquired, EBUSY otherwise. */
static inline int __spin_trylock(spinlock_t *lock)
{
unsigned int val;
val = __lock_test_and_set(lock, 1);
return val == 0 ? 0 : EBUSY;
}
static inline void __spin_unlock(spinlock_t *lock)
{
__lock_release(lock);
}
static inline void __spin_lock_init(spinlock_t *lock)
{
__lock_release(lock);
}
/* Returns 1 if the lock is held, 0 otherwise. */
static inline int __spin_is_locked(spinlock_t *lock)
{
unsigned int val;
val = __add_and_fetch(lock, 0);
return val;
}
#elif defined(MIPS_SPINLOCKS) #elif defined(MIPS_SPINLOCKS)
static inline unsigned int load_linked(unsigned long addr) static inline unsigned int load_linked(unsigned long addr)
@ -221,7 +262,11 @@ static void yield_cpu(void)
static int this_is_smp(void) static int this_is_smp(void)
{ {
#if defined(HAVE_SYSCONF) && defined(SYSCONF_SC_NPROC_ONLN)
return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
#else
return 0; return 0;
#endif
} }
/* /*