We can run without F_NOCACHE if it fails. And we do not know
what combining it with O_DIRECT means, if a system has both.

Howard Chu authored Sep 01, 2016 and Hallvard Furuseth committed Dec 15, 2016

It usually gets done anyway, but one of the fastpath shortcuts
bypassed this step.

Make explicit and default nonzero equivalent. Parenthesize.

1st struct member was not a scalar.

Preserve DB flags (use metapage#1) when main DB is empty.
Fail if metapage root != actual root in output file.

Handle errors.  Fix cond_wait condition so mc_new
is the sole control var.  Drop specious cond_waits.
Do not look at 'mo' while copythr writes it.

Don't know if posix_memalign() pointer is defined after failure.
Some _aligned_free() doc seems to say arg NULL = user error.

Howard Chu authored Jan 07, 2016 and Hallvard Furuseth committed Dec 15, 2016

Logical counterpart to GET_MULTIPLE, NEXT_MULTIPLE

Howard Chu authored Nov 29, 2016 and Hallvard Furuseth committed Dec 15, 2016

Revert excess cursor fixup
xcursor fixup depends on init state

No change in behavior.

Check for PTHREAD_MUTEX_ROBUST_NP definition (this doesn't work
on Linux/glibc because they used an enum). Zero out mutex before
initing.

Don't leave them uninit'd if they now point at a valid DUP node

If we know there are no sub-DBs and no overflow pages, skip leaf scan.

make sure C_DEL gets reset in subcursor after it moves.