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Move db.exchange DB work off of the main thread.

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Cory McWilliams 2024-06-16 10:16:39 -04:00
parent 63776d40bd
commit b6a937c954
2 changed files with 77 additions and 42 deletions
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113
src/database.js.c
View File

@ -245,55 +245,86 @@ static JSValue _database_set(JSContext* context, JSValueConst this_val, int argc
return result;
}
typedef struct _database_exchange_t
{
const char* id;
const char* key;
size_t key_length;
const char* expected;
size_t expected_length;
const char* value;
size_t value_length;
bool result;
JSValue promise[2];
} database_exchange_t;
static void _database_exchange_work(tf_ssb_t* ssb, void* user_data)
{
database_exchange_t* work = user_data;
sqlite3* db = tf_ssb_acquire_db_writer(ssb);
sqlite3_stmt* statement;
if (!work->expected)
{
if (sqlite3_prepare(db, "INSERT INTO properties (id, key, value) VALUES (?1, ?2, ?3) ON CONFLICT DO NOTHING", -1, &statement, NULL) == SQLITE_OK)
{
if (sqlite3_bind_text(statement, 1, work->id, -1, NULL) == SQLITE_OK && sqlite3_bind_text(statement, 2, work->key, work->key_length, NULL) == SQLITE_OK &&
sqlite3_bind_text(statement, 3, work->value, work->value_length, NULL) == SQLITE_OK && sqlite3_step(statement) == SQLITE_DONE)
{
work->result = sqlite3_changes(db) != 0;
}
sqlite3_finalize(statement);
}
}
else if (sqlite3_prepare(db, "UPDATE properties SET value = ?1 WHERE id = ?2 AND key = ?3 AND value = ?4", -1, &statement, NULL) == SQLITE_OK)
{
if (sqlite3_bind_text(statement, 1, work->value, work->value_length, NULL) == SQLITE_OK && sqlite3_bind_text(statement, 2, work->id, -1, NULL) == SQLITE_OK &&
sqlite3_bind_text(statement, 3, work->key, work->key_length, NULL) == SQLITE_OK && sqlite3_bind_text(statement, 4, work->expected, work->expected_length, NULL) == SQLITE_OK &&
sqlite3_step(statement) == SQLITE_DONE)
{
work->result = sqlite3_changes(db) != 0;
}
sqlite3_finalize(statement);
}
tf_ssb_release_db_writer(ssb, db);
}
static void _database_exchange_after_work(tf_ssb_t* ssb, int status, void* user_data)
{
database_exchange_t* work = user_data;
JSContext* context = tf_ssb_get_context(ssb);
JSValue result = work->result ? JS_TRUE : JS_UNDEFINED;
JSValue error = JS_Call(context, work->promise[0], JS_UNDEFINED, 1, &result);
tf_util_report_error(context, error);
JS_FreeValue(context, error);
JS_FreeValue(context, result);
JS_FreeValue(context, work->promise[0]);
JS_FreeValue(context, work->promise[1]);
JS_FreeCString(context, work->key);
JS_FreeCString(context, work->expected);
JS_FreeCString(context, work->value);
tf_free((char*)work->id);
tf_free(work);
}
static JSValue _database_exchange(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
{
JSValue exchanged = JS_UNDEFINED;
JSValue result = JS_UNDEFINED;
database_t* database = JS_GetOpaque(this_val, _database_class_id);
if (database)
{
sqlite3_stmt* statement;
tf_ssb_t* ssb = tf_task_get_ssb(database->task);
sqlite3* db = tf_ssb_acquire_db_writer(ssb);
if (JS_IsNull(argv[1]) || JS_IsUndefined(argv[1]))
database_exchange_t* work = tf_malloc(sizeof(database_exchange_t));
*work = (database_exchange_t)
{
if (sqlite3_prepare(db, "INSERT INTO properties (id, key, value) VALUES (?1, ?2, ?3) ON CONFLICT DO NOTHING", -1, &statement, NULL) == SQLITE_OK)
{
size_t key_length;
size_t set_length;
const char* key = JS_ToCStringLen(context, &key_length, argv[0]);
const char* set = JS_ToCStringLen(context, &set_length, argv[2]);
if (sqlite3_bind_text(statement, 1, database->id, -1, NULL) == SQLITE_OK && sqlite3_bind_text(statement, 2, key, key_length, NULL) == SQLITE_OK &&
sqlite3_bind_text(statement, 3, set, set_length, NULL) == SQLITE_OK && sqlite3_step(statement) == SQLITE_DONE)
{
exchanged = sqlite3_changes(db) != 0 ? JS_TRUE : JS_FALSE;
}
JS_FreeCString(context, key);
JS_FreeCString(context, set);
sqlite3_finalize(statement);
}
}
else if (sqlite3_prepare(db, "UPDATE properties SET value = ?1 WHERE id = ?2 AND key = ?3 AND value = ?4", -1, &statement, NULL) == SQLITE_OK)
{
size_t key_length;
size_t expected_length;
size_t set_length;
const char* key = JS_ToCStringLen(context, &key_length, argv[0]);
const char* expected = JS_ToCStringLen(context, &expected_length, argv[1]);
const char* set = JS_ToCStringLen(context, &set_length, argv[2]);
if (sqlite3_bind_text(statement, 1, set, set_length, NULL) == SQLITE_OK && sqlite3_bind_text(statement, 2, database->id, -1, NULL) == SQLITE_OK &&
sqlite3_bind_text(statement, 3, key, key_length, NULL) == SQLITE_OK && sqlite3_bind_text(statement, 4, expected, expected_length, NULL) == SQLITE_OK &&
sqlite3_step(statement) == SQLITE_DONE)
{
exchanged = sqlite3_changes(db) != 0 ? JS_TRUE : JS_FALSE;
}
JS_FreeCString(context, key);
JS_FreeCString(context, expected);
JS_FreeCString(context, set);
sqlite3_finalize(statement);
}
tf_ssb_release_db_writer(ssb, db);
.id = tf_strdup(database->id),
};
work->key = JS_ToCStringLen(context, &work->key_length, argv[0]);
work->expected = (JS_IsNull(argv[1]) || JS_IsUndefined(argv[1])) ? NULL : JS_ToCStringLen(context, &work->expected_length, argv[1]);
work->value = JS_ToCStringLen(context, &work->value_length, argv[2]);
result = JS_NewPromiseCapability(context, work->promise);
tf_ssb_run_work(ssb, _database_exchange_work, _database_exchange_after_work, work);
}
return exchanged;
return result;
}
static JSValue _database_remove(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)

6
src/tests.c
View File

@ -275,7 +275,11 @@ static void _test_database(const tf_test_options_t* options)
" if (await db.get('a') != 1) {\n"
" exit(2);\n"
" }\n"
" await db.set('b', 2);\n"
" await db.exchange('b', null, 1);\n"
" await db.exchange('b', 1, 2);\n"
" if (await db.get('b') != 2) {\n"
" exit(5);\n"
" }\n"
" await db.set('c', 3);\n"
"\n"
" var expected = ['a', 'b', 'c'];\n"