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Code Issues Releases Wiki Activity

ovsdb-types: Make ovsdb_base_type_get_enum_type() thread-safe.

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Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Andy Zhou <azhou@nicira.com>
This commit is contained in:
Ben Pfaff
2013-04-23 15:02:13 -07:00
parent b41c3e5c90
commit d2d3264cd6
1 changed files with 16 additions and 8 deletions
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24
lib/ovsdb-types.c
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@@ -1,4 +1,4 @@
/* Copyright (c) 2009, 2010, 2011 Nicira, Inc.
/* Copyright (c) 2009, 2010, 2011, 2013 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -22,6 +22,7 @@
#include "dynamic-string.h"
#include "json.h"
#include "ovs-thread.h"
#include "ovsdb-data.h"
#include "ovsdb-error.h"
#include "ovsdb-parser.h"
@@ -158,16 +159,23 @@ ovsdb_base_type_init(struct ovsdb_base_type *base, enum ovsdb_atomic_type type)
const struct ovsdb_type *
ovsdb_base_type_get_enum_type(enum ovsdb_atomic_type atomic_type)
{
static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
static struct ovsdb_type *types[OVSDB_N_TYPES];
if (!types[atomic_type]) {
struct ovsdb_type *type;
if (ovsthread_once_start(&once)) {
enum ovsdb_atomic_type i;
types[atomic_type] = type = xmalloc(sizeof *type);
ovsdb_base_type_init(&type->key, atomic_type);
ovsdb_base_type_init(&type->value, OVSDB_TYPE_VOID);
type->n_min = 1;
type->n_max = UINT_MAX;
for (i = 0; i < OVSDB_N_TYPES; i++) {
struct ovsdb_type *type;
types[i] = type = xmalloc(sizeof *type);
ovsdb_base_type_init(&type->key, i);
ovsdb_base_type_init(&type->value, OVSDB_TYPE_VOID);
type->n_min = 1;
type->n_max = UINT_MAX;
}
ovsthread_once_done(&once);
}
return types[atomic_type];
}