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This code is intended as a demonstration of how the dynamic shared memory and dynamic background worker facilities can be used to establish a group of coooperating processes which can coordinate their activities using the shared memory message queue facility. By itself, the code does nothing particularly interesting: it simply allows messages to be passed through a loop of workers and back to the original process. But it's a useful unit test, in addition to its demonstration value.
20 lines
752 B
SQL
20 lines
752 B
SQL
/* contrib/test_shm_mq/test_shm_mq--1.0.sql */
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-- complain if script is sourced in psql, rather than via CREATE EXTENSION
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\echo Use "CREATE EXTENSION test_shm_mq" to load this file. \quit
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CREATE FUNCTION test_shm_mq(queue_size pg_catalog.int8,
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message pg_catalog.text,
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repeat_count pg_catalog.int4 default 1,
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num_workers pg_catalog.int4 default 1)
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RETURNS pg_catalog.void STRICT
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AS 'MODULE_PATHNAME' LANGUAGE C;
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CREATE FUNCTION test_shm_mq_pipelined(queue_size pg_catalog.int8,
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message pg_catalog.text,
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repeat_count pg_catalog.int4 default 1,
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num_workers pg_catalog.int4 default 1,
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verify pg_catalog.bool default true)
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RETURNS pg_catalog.void STRICT
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AS 'MODULE_PATHNAME' LANGUAGE C;
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