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renamed global variables

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unknown
2006-08-23 17:27:21 +02:00
parent cd40855e9d
commit d83bc171b6
3 changed files with 12 additions and 16 deletions
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23
storage/maria/trxman.c
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@@ -8,7 +8,7 @@ TRX active_list_min, active_list_max,
committed_list_min, committed_list_max, *pool;
pthread_mutex_t LOCK_trx_list;
uint active_transactions;
uint trxman_active_transactions, trxman_allocated_transactions;
TrID global_trid_generator;
TRX **short_id_to_trx;
@@ -30,7 +30,8 @@ int trxman_init()
active_list_max.next= active_list_min.prev= 0;
active_list_max.prev= &active_list_min;
active_list_min.next= &active_list_max;
active_transactions= 0;
trxman_active_transactions= 0;
trxman_allocated_transactions= 0;
committed_list_max.commit_trid= ~0;
committed_list_max.next= committed_list_min.prev= 0;
@@ -54,7 +55,7 @@ int trxman_init()
int trxman_destroy()
{
DBUG_ASSERT(trid_to_trx.count == 0);
DBUG_ASSERT(active_transactions == 0);
DBUG_ASSERT(trxman_active_transactions == 0);
DBUG_ASSERT(active_list_max.prev == &active_list_min);
DBUG_ASSERT(active_list_min.next == &active_list_max);
DBUG_ASSERT(committed_list_max.prev == &committed_list_min);
@@ -62,7 +63,7 @@ int trxman_destroy()
while (pool)
{
TRX *tmp=pool->next;
my_free(pool, MYF(0));
my_free((void *)pool, MYF(0));
pool=tmp;
}
lf_hash_destroy(&trid_to_trx);
@@ -93,21 +94,17 @@ static void set_short_id(TRX *trx)
trx->short_id= i;
}
extern int global_malloc;
TRX *trxman_new_trx()
{
TRX *trx;
my_atomic_add32(&active_transactions, 1);
my_atomic_add32(&trxman_active_transactions, 1);
/*
we need a mutex here to ensure that
transactions in the active list are ordered by the trid.
So, incrementing global_trid_generator and
adding to the list must be atomic.
see trxman_end_trx to see why we need a mutex here
and as we have a mutex, we can as well do everything
under it - allocating a TRX, incrementing active_transactions,
under it - allocating a TRX, incrementing trxman_active_transactions,
setting trx->min_read_from.
Note that all the above is fast. generating short_id may be slow,
@@ -123,7 +120,7 @@ TRX *trxman_new_trx()
if (!trx)
{
trx=(TRX *)my_malloc(sizeof(TRX), MYF(MY_WME));
global_malloc++;
trxman_allocated_transactions++;
}
if (!trx)
return 0;
@@ -213,7 +210,7 @@ void trxman_end_trx(TRX *trx, my_bool commit)
}
pthread_mutex_unlock(&LOCK_trx_list);
my_atomic_add32(&active_transactions, -1);
my_atomic_add32(&trxman_active_transactions, -1);
while (free_me)
{

2
storage/maria/trxman.h
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@@ -12,7 +12,7 @@ typedef struct st_transaction
#define SHORT_ID_MAX 65535
extern uint active_transactions;
extern uint trxman_active_transactions, trxman_allocated_transactions;
extern TRX **short_id_to_trx;
extern my_atomic_rwlock_t LOCK_short_id_to_trx;

3
unittest/maria/trxman-t.c
View File

@@ -106,7 +106,6 @@ void run_test(const char *test, pthread_handler handler, int n, int m)
ok(litmus == 0, "tested %s in %g secs (%d)", test, ((double)now)/1e7, litmus);
}
int global_malloc=0;
int main()
{
plan(1);
@@ -127,7 +126,7 @@ int main()
trxman_init();
run_test("trxman", test_trxman, THREADS,CYCLES);
trxman_destroy();
diag("mallocs: %d\n", global_malloc);
diag("mallocs: %d\n", trxman_allocated_transactions);
pthread_mutex_destroy(&rt_mutex);
pthread_cond_destroy(&rt_cond);