diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/miscadmin.h | 1 | ||||
| -rw-r--r-- | src/include/port/pg_bitutils.h | 50 |
2 files changed, 49 insertions, 2 deletions
diff --git a/src/include/miscadmin.h b/src/include/miscadmin.h index 4dc343cbc59..3f155ce4f84 100644 --- a/src/include/miscadmin.h +++ b/src/include/miscadmin.h @@ -486,6 +486,7 @@ extern bool BackupInProgress(void); extern void CancelBackup(void); /* in executor/nodeHash.c */ +extern size_t get_hash_memory_limit(void); extern int get_hash_mem(void); #endif /* MISCADMIN_H */ diff --git a/src/include/port/pg_bitutils.h b/src/include/port/pg_bitutils.h index f9b77ec2780..086bd08132f 100644 --- a/src/include/port/pg_bitutils.h +++ b/src/include/port/pg_bitutils.h @@ -137,7 +137,7 @@ pg_rightmost_one_pos64(uint64 word) /* * pg_nextpower2_32 - * Returns the next highest power of 2 of 'num', or 'num', if it's + * Returns the next higher power of 2 above 'num', or 'num' if it's * already a power of 2. * * 'num' mustn't be 0 or be above PG_UINT32_MAX / 2 + 1. @@ -160,7 +160,7 @@ pg_nextpower2_32(uint32 num) /* * pg_nextpower2_64 - * Returns the next highest power of 2 of 'num', or 'num', if it's + * Returns the next higher power of 2 above 'num', or 'num' if it's * already a power of 2. * * 'num' mustn't be 0 or be above PG_UINT64_MAX / 2 + 1. @@ -182,6 +182,52 @@ pg_nextpower2_64(uint64 num) } /* + * pg_nextpower2_size_t + * Returns the next higher power of 2 above 'num', for a size_t input. + */ +#if SIZEOF_SIZE_T == 4 +#define pg_nextpower2_size_t(num) pg_nextpower2_32(num) +#else +#define pg_nextpower2_size_t(num) pg_nextpower2_64(num) +#endif + +/* + * pg_prevpower2_32 + * Returns the next lower power of 2 below 'num', or 'num' if it's + * already a power of 2. + * + * 'num' mustn't be 0. + */ +static inline uint32 +pg_prevpower2_32(uint32 num) +{ + return ((uint32) 1) << pg_leftmost_one_pos32(num); +} + +/* + * pg_prevpower2_64 + * Returns the next lower power of 2 below 'num', or 'num' if it's + * already a power of 2. + * + * 'num' mustn't be 0. + */ +static inline uint64 +pg_prevpower2_64(uint64 num) +{ + return ((uint64) 1) << pg_leftmost_one_pos64(num); +} + +/* + * pg_prevpower2_size_t + * Returns the next lower power of 2 below 'num', for a size_t input. + */ +#if SIZEOF_SIZE_T == 4 +#define pg_prevpower2_size_t(num) pg_prevpower2_32(num) +#else +#define pg_prevpower2_size_t(num) pg_prevpower2_64(num) +#endif + +/* * pg_ceil_log2_32 * Returns equivalent of ceil(log2(num)) */ |