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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 12:15:05 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 12:15:05 +0000
commit46651ce6fe013220ed397add242004d764fc0153 (patch)
tree6e5299f990f88e60174a1d3ae6e48eedd2688b2b /src/include/executor/tqueue.h
parentInitial commit. (diff)
downloadpostgresql-14-upstream.tar.xz
postgresql-14-upstream.zip
Adding upstream version 14.5.upstream/14.5upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/include/executor/tqueue.h')
-rw-r--r--src/include/executor/tqueue.h32
1 files changed, 32 insertions, 0 deletions
diff --git a/src/include/executor/tqueue.h b/src/include/executor/tqueue.h
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+++ b/src/include/executor/tqueue.h
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+/*-------------------------------------------------------------------------
+ *
+ * tqueue.h
+ * Use shm_mq to send & receive tuples between parallel backends
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/executor/tqueue.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef TQUEUE_H
+#define TQUEUE_H
+
+#include "storage/shm_mq.h"
+#include "tcop/dest.h"
+
+/* Opaque struct, only known inside tqueue.c. */
+typedef struct TupleQueueReader TupleQueueReader;
+
+/* Use this to send tuples to a shm_mq. */
+extern DestReceiver *CreateTupleQueueDestReceiver(shm_mq_handle *handle);
+
+/* Use these to receive tuples from a shm_mq. */
+extern TupleQueueReader *CreateTupleQueueReader(shm_mq_handle *handle);
+extern void DestroyTupleQueueReader(TupleQueueReader *reader);
+extern MinimalTuple TupleQueueReaderNext(TupleQueueReader *reader,
+ bool nowait, bool *done);
+
+#endif /* TQUEUE_H */