mirrors/postgres
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Use 4-byte slock_t on both PPC and PPC64.

Browse Source 
Previously we defined slock_t as 8 bytes on PPC64, but the TAS assembly
code uses word-wide operations regardless, so that the second word was
just wasted space.  There doesn't appear to be any performance benefit
in adding the second word, so get rid of it to simplify the code.
This commit is contained in:
Tom Lane 2012-01-01 22:44:01 -05:00
parent 5cfa8dd300
commit 8496c6cd77
1 changed files with 1 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/include/storage/s_lock.h
View File

@ -354,13 +354,10 @@ tas(volatile slock_t *lock)
#if defined(__ppc__) || defined(__powerpc__) || defined(__ppc64__) || defined(__powerpc64__)
#define HAS_TEST_AND_SET
#if defined(__ppc64__) || defined(__powerpc64__)
typedef unsigned long slock_t;
#else
typedef unsigned int slock_t;
#endif
#define TAS(lock) tas(lock)
/*
* NOTE: per the Enhanced PowerPC Architecture manual, v1.0 dated 7-May-2002,
* an isync is a sufficient synchronization barrier after a lwarx/stwcx loop.