Refactor some code related to wait events "BufferPin" and "Extension"

The following changes are done:
- Addition of WaitEventBufferPin and WaitEventExtension, that hold a
list of wait events related to each category.
- Addition of two functions that encapsulate the list of wait events for
each category.
- Rename BUFFER_PIN to BUFFERPIN (only this wait event class used an
underscore, requiring a specific rule in the automation script).

These changes make a bit easier the automatic generation of all the code
and documentation related to wait events, as all the wait event
categories are now controlled by consistent structures and functions.

Author: Bertrand Drouvot
Discussion: https://postgr.es/m/[email protected]
Discussion: https://postgr.es/m/[email protected]

1 files changed, 19 insertions, 1 deletions

diff --git a/src/include/utils/wait_event.h b/src/include/utils/wait_event.h
index 518d3b0a1f7..dc01d4e84df 100644
--- a/src/include/utils/wait_event.h
+++ b/src/include/utils/wait_event.h
@@ -17,7 +17,7 @@
  */
 #define PG_WAIT_LWLOCK				0x01000000U
 #define PG_WAIT_LOCK				0x03000000U
-#define PG_WAIT_BUFFER_PIN			0x04000000U
+#define PG_WAIT_BUFFERPIN			0x04000000U
 #define PG_WAIT_ACTIVITY			0x05000000U
 #define PG_WAIT_CLIENT				0x06000000U
 #define PG_WAIT_EXTENSION			0x07000000U
@@ -51,6 +51,15 @@ typedef enum
 } WaitEventActivity;
 
 /* ----------
+ * Wait Events - BUFFERPIN
+ * ----------
+ */
+typedef enum
+{
+	WAIT_EVENT_BUFFER_PIN = PG_WAIT_BUFFERPIN
+} WaitEventBufferPin;
+
+/* ----------
  * Wait Events - Client
  *
  * Use this category when a process is waiting to send data to or receive data
@@ -71,6 +80,15 @@ typedef enum
 } WaitEventClient;
 
 /* ----------
+ * Wait Events - EXTENSION
+ * ----------
+ */
+typedef enum
+{
+	WAIT_EVENT_EXTENSION = PG_WAIT_EXTENSION
+} WaitEventExtension;
+
+/* ----------
  * Wait Events - IPC
  *
  * Use this category when a process cannot complete the work it is doing because