Does PG support bulk operation in embedded C

To explain pls refer to this for DB2

http://www-01.ibm.com/support/knowledgecenter/SSEPGG_9.7.0/com.ibm.db2.luw.apdv.cli.doc/doc/r0002329.html

Essentially in one single sql call, we can do
-- Add new rows
-- Update a set of rows where each row is identified by a bookmark
-- Delete a set of rows where each row is identified by a bookmark
-- Fetch a set of rows where each row is identified by a bookmark

This gives tremendous performance benefits as the network round trip is
avoided for each sql.

I am looking for an equivalent of this in PG and C language.

Thanks.