Add new memory barriers during initialization.

FossilOrigin-Name: a9b2adc5d61790abd86839d12e7ecb98a85d7e4cde5f94558530e32449d9e483

Make the internal dynamic string interface available to extensions using
the new sqlite3_str object and its associated methods. This is mostly just
a renaming of internal objects and methods to use

Make the internal dynamic string interface available to extensions using
the new sqlite3_str object and its associated methods. This is mostly just
a renaming of internal objects and methods to use external names, through
there are a few small wrapper functions.

FossilOrigin-Name: 87f261f0cb800b06ad786f6df16f2c4dddd0d93dfdcc77b4a4eaa22920b56bf1

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Fix a compilation problem when both SQLITE_ENABLE_MULTITHREADED_CHECKS and
SQLITE_ENABLE_API_ARMOUR are defined.

FossilOrigin-Name: 0342ce510d2063a63839399a2cfa25b7fc02f4fde17764082676b332d6136241

Use a symbolic constant instead of a literal (-1) to identify a
warn-on-contention mutex.

FossilOrigin-Name: 12a23c0a66fac5c9674120b390f6abaeaba3f7ff04693b281af1eefb93d6f47c

Add experimental feature to detect threading bugs in apps that use
SQLITE_CONFIG_MULTITHREADED. Enabled at compile time using
SQLITE_ENABLE_MULTITHREADED_CHECKS.

FossilOrigin-Name: a66886ac13aa6d8cc

Add experimental feature to detect threading bugs in apps that use
SQLITE_CONFIG_MULTITHREADED. Enabled at compile time using
SQLITE_ENABLE_MULTITHREADED_CHECKS.

FossilOrigin-Name: a66886ac13aa6d8ccbb6d673ddd00267c93e3ee1fbc158236fce3157d150868d

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Import common changes from the mutex initialization branch.

FossilOrigin-Name: 334720c01722478af0d3dfd6fe8bafd88ba09f49

Add a memory barrier to the mutex initialization logic, try to work around
an issue reported by WebKit.

FossilOrigin-Name: 11a9a786ec06403addb47f5c6fb142b382fae522

Fix harmless compiler warnings.

FossilOrigin-Name: b0badb99023e23bef0e2064cec58f2b279af0c0b

Add special handling for static mutexes in sqlite3_mutex_alloc() when automatic calls to sqlite3_initialize() are enabled.

FossilOrigin-Name: 7857d27caa845e5629d94c2e66587dc89016daca

Add three new static mutexes for use by the application. This is a partial
import of changes from the threads branch.

FossilOrigin-Name: 3aad01960f92c5e77dba64ac1a6c6b063378fb97

Get SQLITE_MUTEX_STATIC_APP1 and _APP2 working for the debugMutex
implementation.

FossilOrigin-Name: f49ba1c926c63ee1c4609930138389fca182c845

Fix typos and comments and make minor changes to a few function names,
as suggested by readership.

FossilOrigin-Name: e9d05cbb7676cbda83f1b3b71447404d7edde898

Add some 'const' markers to static data that is really constant.

FossilOrigin-Name: e7073e23b80e7cae0c76d42f014ee9b2d40a8f2f

When the in single-threaded mode, the sqlite3_mutex_alloc() interface
still returns a non-NULL value. The mutex doesn't do anything, but it
tests non-NULL. This way, extensions (or VFSes) that use

When the in single-threaded mode, the sqlite3_mutex_alloc() interface
still returns a non-NULL value. The mutex doesn't do anything, but it
tests non-NULL. This way, extensions (or VFSes) that use sqlite3_mutex_alloc()
can tell the difference between an OOM error and mutexes being disabled.

FossilOrigin-Name: 451fd175758983c335aab449fdc4cb838156c4cb

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Fix the sqlite3_mutex_alloc() interface to return NULL (not segfault) when
operating in threadsafe mode. (This is a general-purpose bug fix which
really ought to be ported to trunk.)

FossilOrigin-N

Fix the sqlite3_mutex_alloc() interface to return NULL (not segfault) when
operating in threadsafe mode. (This is a general-purpose bug fix which
really ought to be ported to trunk.)

FossilOrigin-Name: 64840a3caf569959c9d5e63bdbc0cf675fda3882

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Remove the obsolete "$Id:$" RCS identifier strings from the source code.

FossilOrigin-Name: f6c045f649036958078cb15cd9d5453680c82b0c

Change a couple of comments to use "SQLITE_MUTEX_OMIT" instead of OMIT_MUTEX.

FossilOrigin-Name: b733e939f785111eac987fe4a25ccfa512e4f0b4

Omit the mutexIsInit test variable when mutexes are disabled.

FossilOrigin-Name: 3ea10434434d27a1300ba2b58e2c47c54909f4ff

Add assert() statement to verify that new mutexes are not allocated when
the mutex subsystem is uninitialized.

FossilOrigin-Name: 1183c533571bc9c7ce56102b718f3e4f4e78019e

Code simplifications and comment improvements in support of structural
coverage testing. (CVS 6899)

FossilOrigin-Name: 945251798144110787b197f9eb552a2dd4a25cb4

Allow sqlite3_shutdown() to be called by a process before sqlite3_initialize() is. Prior to this commit such a call could segfault. (CVS 6296)

FossilOrigin-Name: 79431c58d964d6057c7f42f7c1df74f3df44

Allow sqlite3_shutdown() to be called by a process before sqlite3_initialize() is. Prior to this commit such a call could segfault. (CVS 6296)

FossilOrigin-Name: 79431c58d964d6057c7f42f7c1df74f3df4493eb

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Remove the SQLITE_MUTEX_APPDEF compile-time option. The SQLITE_THREADSAFE=0
option always removes all mutex code. For application-defined mutexes only,
use SQLITE_THREADSAFE=1 with SQLITE_MUTEX_NOO

Remove the SQLITE_MUTEX_APPDEF compile-time option. The SQLITE_THREADSAFE=0
option always removes all mutex code. For application-defined mutexes only,
use SQLITE_THREADSAFE=1 with SQLITE_MUTEX_NOOP=1. Ticket #3421. (CVS 5779)

FossilOrigin-Name: 02a12eb1cfe9307c66556105a1a99d657cc01ab5

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Begin adding support for the SQLITE_OMIT_WSD macro. Some (many) WSD variables still need wrappers added to them. (CVS 5652)

FossilOrigin-Name: 573d92abb9adb1c321ebc2fcadcf14374213b093

Shuffle some of the mutex related documentation in sqlite.h.in to match the new sqlite3_mutex_methods based API. (CVS 5244)

FossilOrigin-Name: 9cd7f8669a59c6096331229df2e2ad87e628abab

Remove public APIs sqlite3_mutex_init() and sqlite3_mutex_end(). This commit only changes the code, documentation is not updated yet. (CVS 5238)

FossilOrigin-Name: 42a2a8f49324e2e07b81fd08e24f636a2d

Remove public APIs sqlite3_mutex_init() and sqlite3_mutex_end(). This commit only changes the code, documentation is not updated yet. (CVS 5238)

FossilOrigin-Name: 42a2a8f49324e2e07b81fd08e24f636a2d98a961

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