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Overview
Comment:Add comments related to database locking to sqlite3ota.h.
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SHA1:77242965e77446313a8f0a65a39fccb67fe4cabf
User & Date: dan 2015-04-22 11:34:38
Context
2015-04-23
18:14
Have OTA maintain a small LRU cache of UPDATE statements. This reduces the amount of time it spends compiling UPDATE if a single data_xxx table contains many different ota_control strings. check-in: baee3556 user: dan tags: ota-update
2015-04-22
11:34
Add comments related to database locking to sqlite3ota.h. check-in: 77242965 user: dan tags: ota-update
2015-04-21
15:35
Add a comment to sqlite3ota.h. No code changes. check-in: 352fa09e user: dan tags: ota-update
Changes
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Changes to ext/ota/sqlite3ota.h.

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** time sqlite3ota_close() is called, various state information is saved 
** within the OTA database. This allows subsequent processes to automatically
** resume the OTA update from where it left off.
**
** To remove all OTA extension state information, returning an OTA database 
** to its original contents, it is sufficient to drop all tables that begin
** with the prefix "ota_"













*/

#ifndef _SQLITE3OTA_H
#define _SQLITE3OTA_H

#include "sqlite3.h"              /* Required for error code definitions */








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** time sqlite3ota_close() is called, various state information is saved 
** within the OTA database. This allows subsequent processes to automatically
** resume the OTA update from where it left off.
**
** To remove all OTA extension state information, returning an OTA database 
** to its original contents, it is sufficient to drop all tables that begin
** with the prefix "ota_"
**
** DATABASE LOCKING
**
** An OTA update may not be applied to a database in WAL mode. Attempting
** to do so is an error (SQLITE_ERROR).
**
** While an OTA handle is open, a SHARED lock may be held on the target
** database file. This means it is possible for other clients to read the
** database, but not to write it.
**
** If an OTA update is started and then suspended before it is completed,
** then an external client writes to the database, then attempting to resume
** the suspended OTA update is also an error (SQLITE_BUSY).
*/

#ifndef _SQLITE3OTA_H
#define _SQLITE3OTA_H

#include "sqlite3.h"              /* Required for error code definitions */