diff options
| author | unknown <knielsen@knielsen-hq.org> | 2011-09-20 12:49:25 +0200 |
|---|---|---|
| committer | unknown <knielsen@knielsen-hq.org> | 2011-09-20 12:49:25 +0200 |
| commit | a5b881594da4258257b18cc42f5ce7be3524e02c (patch) | |
| tree | 6ddddaef439cce2f930abfab3929f9ad80d8c818 /include/my_dbug.h | |
| parent | 1a344b87e4d153d52468307cc886b5f424cb2dbf (diff) | |
| download | mariadb-git-a5b881594da4258257b18cc42f5ce7be3524e02c.tar.gz | |
MWL#192: Non-blocking client API for libmysqlclient.
All client functions that can block on I/O have alternate _start() and
_cont() versions that do not block but return control back to the
application, which can then issue I/O wait in its own fashion and later
call back into the library to continue the operation.
Works behind the scenes by spawning a co-routine/fiber to run the
blocking operation and suspend it while waiting for I/O. This
co-routine/fiber use is invisible to applications.
For i368/x86_64 on GCC, uses very fast assembler co-routine support. On
Windows uses native Win32 Fibers. Falls back to POSIX ucontext on other
platforms. Assembler routines for more platforms are relatively easy to
add by extending mysys/my_context.c, eg. similar to the Lua lcoco
library.
For testing, mysqltest and mysql_client_test are extended with the
option --non-blocking-api. This causes the programs to use the
non-blocking API for database access. mysql-test-run.pl has a similar
option --non-blocking-api that uses this, as well as additional
testcases.
An example program tests/async_queries.c is included that uses the new
non-blocking API with libevent to show how, in a single-threaded
program, to issue many queries in parallel against a database.
client/async_example.c:
Fix const warning
******
Fix bug with wrong timeout value for poll().
include/Makefile.am:
Fix missing include for `make dist`
include/mysql.h:
Add prototypes for all non-blocking API calls.
include/mysql.h.pp:
Add prototypes for all non-blocking API calls.
mysys/my_context.c:
Fix type warning for makecontext() function pointer argument.
sql-common/mysql_async.c:
Fix crashes in the non-blocking API for functions that can take MYSQL argument
that is NULL.
tests/Makefile.am:
Add header file to `make dist`
tests/mysql_client_test.c:
Replace blocking calls with wrappers around the non-blocking calls, used in
mysql_client_test to test the new non-blocking API.
tests/nonblock-wrappers.h:
Replace blocking calls with wrappers around the non-blocking calls, used in
mysql_client_test to test the new non-blocking API.
Diffstat (limited to 'include/my_dbug.h')
| -rw-r--r-- | include/my_dbug.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/my_dbug.h b/include/my_dbug.h index ef30c95e32a..a58c6588d61 100644 --- a/include/my_dbug.h +++ b/include/my_dbug.h @@ -83,6 +83,8 @@ extern void _db_lock_file_(void); extern void _db_unlock_file_(void); extern FILE *_db_fp_(void); extern void _db_flush_(); +extern void dbug_swap_code_state(void **code_state_store); +extern void dbug_free_code_state(void **code_state_store); #ifdef __cplusplus |