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hash: move the random generator out of bees-hash.cc

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We need random numbers in more places, so centralize the engines.
Initialize with a proper random seed so every worker thread gets
different behavior.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell
2021-11-16 00:55:58 -05:00
parent 73f94750ec
commit ba694b4881
3 changed files with 14 additions and 4 deletions
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4
src/bees.h
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@ -18,6 +18,7 @@
#include <list>
#include <mutex>
#include <string>
#include <random>
#include <thread>
#include <syslog.h>
@ -496,6 +497,8 @@ private:
BeesHashTable(const BeesHashTable &) = delete;
BeesHashTable &operator=(const BeesHashTable &) = delete;
static thread_local uniform_int_distribution<size_t> tl_distribution;
};
ostream &operator<<(ostream &os, const BeesHashTable::Cell &bhte);
@ -881,6 +884,7 @@ public:
extern int bees_log_level;
extern const char *BEES_USAGE;
extern const char *BEES_VERSION;
extern thread_local default_random_engine bees_generator;
string pretty(double d);
void bees_sync(int fd);
void bees_readahead(int fd, off_t offset, size_t size);