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Remove dead pread and pwrite replacement code.

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pread() and pwrite() are in SUSv2, and all targeted Unix systems have
them.

Previously, we defined pg_pread and pg_pwrite to emulate these function
with lseek() on old Unixen.  The names with a pg_ prefix were a reminder
of a portability hazard: they might change the current file position.
That hazard is gone, so we can drop the prefixes.

Since the remaining replacement code is Windows-only, move it into
src/port/win32p{read,write}.c, and move the declarations into
src/include/port/win32_port.h.

No need for vestigial HAVE_PREAD, HAVE_PWRITE macros as they were only
used for declarations in port.h which have now moved into win32_port.h.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Greg Stark <stark@mit.edu>
Reviewed-by: Robert Haas <robertmhaas@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CA+hUKGJ3LHeP9w5Fgzdr4G8AnEtJ=z=p6hGDEm4qYGEUX5B6fQ@mail.gmail.com
This commit is contained in:
Thomas Munro
2022-08-05 09:42:31 +12:00
parent 71f5dc6dfb
commit cf112c1220
23 changed files with 76 additions and 137 deletions
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4
contrib/pg_stat_statements/pg_stat_statements.c
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@ -2103,9 +2103,9 @@ qtext_store(const char *query, int query_len,
if (fd < 0)
goto error;
if (pg_pwrite(fd, query, query_len, off) != query_len)
if (pwrite(fd, query, query_len, off) != query_len)
goto error;
if (pg_pwrite(fd, "\0", 1, off + query_len) != 1)
if (pwrite(fd, "\0", 1, off + query_len) != 1)
goto error;
CloseTransientFile(fd);