Thread: pgsql: Provide pg_pread() and pg_pwrite() for random I/O.
Provide pg_pread() and pg_pwrite() for random I/O. Forward to POSIX pread() and pwrite(), or emulate them if unavailable. The emulation is not perfect as the file position is changed, so we'll put pg_ prefixes on the names to minimize the risk of confusion in future patches that might inadvertently try to mix pread() and read() on the same file descriptor. Author: Thomas Munro Reviewed-by: Tom Lane, Jesper Pedersen Discussion: https://postgr.es/m/CAEepm=02rapCpPR3ZGF2vW=SBHSdFYO_bz_f-wwWJonmA3APgw@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/3fd2a7932ef0708dda57369bb20c0499d905cc82 Modified Files -------------- configure | 26 ++++++++++++++++++++ configure.in | 2 ++ src/include/pg_config.h.in | 6 +++++ src/include/pg_config.h.win32 | 6 +++++ src/include/port.h | 17 +++++++++++++ src/port/pread.c | 55 +++++++++++++++++++++++++++++++++++++++++++ src/port/pwrite.c | 55 +++++++++++++++++++++++++++++++++++++++++++ src/tools/msvc/Mkvcbuild.pm | 1 + 8 files changed, 168 insertions(+)