db4 isn't working correctly on macppc for me and confirmed by <kili at
outback.escape.de> after I posted to misc@ - I think it looks like a
problem with the mutex assembly code.
I noticed it when trying to install Cyrus which was looping during the
initial 'ctl_cyrusdb -r' at startup, and verified it with
/usr/local/share/examples/db4/ex_env.c. (see <http://tinyurl.com/d84gy>
for my original posts).
I don't know if it's a correct and/or good solution, but I found
<http://cvs.gnome.org/viewcvs/*checkout*/evolution-data-server/libdb/dbinc/mutex.h>
which uses slightly different ppc mutex code; from my initial quick
testing it looks like this fixes Cyrus for me and makes ex_env.c behave
the same as it does on i386.
The relevant part to replace the existing
/usr/ports/databases/db/v4/patches/patch-dbinc_mutex_h is below.
--- dbinc/mutex.h.orig Sat Sep 20 22:40:49 2003
+++ dbinc/mutex.h Wed Aug 24 01:58:17 2005
@@ -578,33 +578,27 @@
* 'set' mutexes have the value 1, like on Intel; the returned value
from
* MUTEX_SET() is 1 if the mutex previously had its low bit clear, 0
otherwise.
*/
-#ifdef HAVE_MUTEX_PPC_GCC_ASSEMBLY
-static inline int
-MUTEX_SET(int *tsl) {
- int __r;
- asm volatile (
-"0: \n\t"
-" lwarx %0,0,%1 \n\t"
-" cmpwi %0,0 \n\t"
-" bne- 1f \n\t"
-" stwcx. %1,0,%1 \n\t"
-" isync \n\t"
-" beq+ 2f \n\t"
-" b 0b \n\t"
-"1: \n\t"
-" li %1, 0 \n\t"
-"2: \n\t"
- : "=&r" (__r), "+r" (tsl)
- :
- : "cr0", "memory");
- return (int)tsl;
-}
-#endif
-static inline int
-MUTEX_UNSET(tsl_t *tsl) {
- asm volatile("sync" : : : "memory");
- return *tsl = 0;
-}
+#define MUTEX_SET(tsl) ({ \
+ int __one = 1; \
+ int __r; \
+ tsl_t *__l = (tsl); \
+ asm volatile (" \
+0: \
+ lwarx %0,0,%1; \
+ cmpwi %0,0; \
+ bne 1f; \
+ stwcx. %2,0,%1; \
+ bne- 0b; \
+ isync; \
+1:" \
+ : "=&r" (__r) \
+ : "r" (__l), "r" (__one)); \
+ !(__r & 1); \
+})
+#define MUTEX_UNSET(tsl) ({ \
+ asm volatile("lwsync":::"memory"); \
+ (*(tsl) = 0); \
+})
#define MUTEX_INIT(tsl) MUTEX_UNSET(tsl)
#endif
#endif
