diff options
Diffstat (limited to 'db2/mutex/alpha.dec')
| -rw-r--r-- | db2/mutex/alpha.dec | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/db2/mutex/alpha.dec b/db2/mutex/alpha.dec new file mode 100644 index 0000000000..83ed371136 --- /dev/null +++ b/db2/mutex/alpha.dec @@ -0,0 +1,25 @@ +/* + * @(#)alpha.dec 8.3 (Sleepycat Software) 1/18/97 + * + * The DEC C asm acts as a pseudo-call. The first argument is the assembly + * code, and the remaining arguments are assigned as in a procedure call, to + * r16, r17, etc. (represented in asm as %a0, %a1, and so forth). + * + * From: Dave Butenhof. + */ + +#include <c_asm.h> + +#define TSL_SET(tsl) (asm ("mb; \ + 10: ldl_l %v0,(%a0) ; \ + bne %v0,30f ; \ + or %v0,1,%r1 ; \ + stl_c %r1,(%a0) ; \ + beq %r1,20f ; \ + mb ; \ + br %r31,30f ; \ + 20: br %r31,10b ; \ + 30: ", (tsl))) + +THIS WAS NOT CONVERTED TO TAKE A POINTER AS AN ARGUMENT... +#define TSL_UNSET(tsl) (asm ("mb"), *(tsl) = 0) |