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authorThomas Munro <tmunro@postgresql.org>2018-11-15 17:10:43 +1300
committerThomas Munro <tmunro@postgresql.org>2018-11-15 17:38:55 +1300
commitab8984f52d9b99234d23e6fb7b73cf4c12b3ac14 (patch)
tree7bd993576a8fb39867c6a10cdc9f6a0e8be0a4f8 /src
parent5b0ce3ec334bb65bbab4aba78f204f986c356e80 (diff)
downloadpostgresql-ab8984f52d9b99234d23e6fb7b73cf4c12b3ac14.tar.gz
postgresql-ab8984f52d9b99234d23e6fb7b73cf4c12b3ac14.zip
Further adjustment to random() seed initialization.
Per complaint from Tom Lane, don't chomp the timestamp at 32 bits, so we can shift in some of its higher bits. Discussion: https://postgr.es/m/14712.1542253115%40sss.pgh.pa.us
Diffstat (limited to 'src')
-rw-r--r--src/backend/postmaster/postmaster.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index 981a058522f..cb49f3255f9 100644
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -2532,9 +2532,9 @@ InitProcessGlobals(void)
* in a given time period. Since that would leave only 20 bits of the
* timestamp that cycle every ~1 second, also mix in some higher bits.
*/
- srandom(((unsigned int) MyProcPid) ^
- ((unsigned int) MyStartTimestamp << 12) ^
- ((unsigned int) MyStartTimestamp >> 20));
+ srandom(((uint64) MyProcPid) ^
+ ((uint64) MyStartTimestamp << 12) ^
+ ((uint64) MyStartTimestamp >> 20));
}