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author | Michael Roth <mdroth@linux.vnet.ibm.com> | 2011-07-19 14:50:35 -0500 |
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committer | Luiz Capitulino <lcapitulino@gmail.com> | 2011-07-21 16:48:13 -0300 |
commit | d5f3c29cf8d59fad4f3c657fc0a26510043bec65 (patch) | |
tree | b01471f3cb503f6ecc991398c6819347a75b8ae4 /qapi | |
parent | e4e6aa14ed377d808aba4643cd922403606d4dee (diff) | |
download | qemu-d5f3c29cf8d59fad4f3c657fc0a26510043bec65.zip qemu-d5f3c29cf8d59fad4f3c657fc0a26510043bec65.tar.gz qemu-d5f3c29cf8d59fad4f3c657fc0a26510043bec65.tar.bz2 |
qapi: add QAPI dealloc visitor
Type of Visitor class that can be passed into a qapi-generated C
type's visitor function to free() any heap-allocated data types.
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
Diffstat (limited to 'qapi')
-rw-r--r-- | qapi/qapi-dealloc-visitor.c | 147 | ||||
-rw-r--r-- | qapi/qapi-dealloc-visitor.h | 26 |
2 files changed, 173 insertions, 0 deletions
diff --git a/qapi/qapi-dealloc-visitor.c b/qapi/qapi-dealloc-visitor.c new file mode 100644 index 0000000..8cde4dd --- /dev/null +++ b/qapi/qapi-dealloc-visitor.c @@ -0,0 +1,147 @@ +/* + * Dealloc Visitor + * + * Copyright IBM, Corp. 2011 + * + * Authors: + * Michael Roth <mdroth@linux.vnet.ibm.com> + * + * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. + * See the COPYING.LIB file in the top-level directory. + * + */ + +#include "qapi-dealloc-visitor.h" +#include "qemu-queue.h" +#include "qemu-common.h" +#include "qemu-objects.h" + +typedef struct StackEntry +{ + void *value; + QTAILQ_ENTRY(StackEntry) node; +} StackEntry; + +struct QapiDeallocVisitor +{ + Visitor visitor; + QTAILQ_HEAD(, StackEntry) stack; +}; + +static QapiDeallocVisitor *to_qov(Visitor *v) +{ + return container_of(v, QapiDeallocVisitor, visitor); +} + +static void qapi_dealloc_push(QapiDeallocVisitor *qov, void *value) +{ + StackEntry *e = qemu_mallocz(sizeof(*e)); + + e->value = value; + QTAILQ_INSERT_HEAD(&qov->stack, e, node); +} + +static void *qapi_dealloc_pop(QapiDeallocVisitor *qov) +{ + StackEntry *e = QTAILQ_FIRST(&qov->stack); + QObject *value; + QTAILQ_REMOVE(&qov->stack, e, node); + value = e->value; + qemu_free(e); + return value; +} + +static void qapi_dealloc_start_struct(Visitor *v, void **obj, const char *kind, + const char *name, size_t unused, + Error **errp) +{ + QapiDeallocVisitor *qov = to_qov(v); + qapi_dealloc_push(qov, obj); +} + +static void qapi_dealloc_end_struct(Visitor *v, Error **errp) +{ + QapiDeallocVisitor *qov = to_qov(v); + void **obj = qapi_dealloc_pop(qov); + if (obj) { + qemu_free(*obj); + } +} + +static void qapi_dealloc_start_list(Visitor *v, const char *name, Error **errp) +{ +} + +static GenericList *qapi_dealloc_next_list(Visitor *v, GenericList **list, + Error **errp) +{ + GenericList *retval = *list; + qemu_free(retval->value); + *list = retval->next; + return retval; +} + +static void qapi_dealloc_end_list(Visitor *v, Error **errp) +{ +} + +static void qapi_dealloc_type_str(Visitor *v, char **obj, const char *name, + Error **errp) +{ + if (obj) { + qemu_free(*obj); + } +} + +static void qapi_dealloc_type_int(Visitor *v, int64_t *obj, const char *name, + Error **errp) +{ +} + +static void qapi_dealloc_type_bool(Visitor *v, bool *obj, const char *name, + Error **errp) +{ +} + +static void qapi_dealloc_type_number(Visitor *v, double *obj, const char *name, + Error **errp) +{ +} + +static void qapi_dealloc_type_enum(Visitor *v, int *obj, const char *strings[], + const char *kind, const char *name, + Error **errp) +{ +} + +Visitor *qapi_dealloc_get_visitor(QapiDeallocVisitor *v) +{ + return &v->visitor; +} + +void qapi_dealloc_visitor_cleanup(QapiDeallocVisitor *v) +{ + qemu_free(v); +} + +QapiDeallocVisitor *qapi_dealloc_visitor_new(void) +{ + QapiDeallocVisitor *v; + + v = qemu_mallocz(sizeof(*v)); + + v->visitor.start_struct = qapi_dealloc_start_struct; + v->visitor.end_struct = qapi_dealloc_end_struct; + v->visitor.start_list = qapi_dealloc_start_list; + v->visitor.next_list = qapi_dealloc_next_list; + v->visitor.end_list = qapi_dealloc_end_list; + v->visitor.type_enum = qapi_dealloc_type_enum; + v->visitor.type_int = qapi_dealloc_type_int; + v->visitor.type_bool = qapi_dealloc_type_bool; + v->visitor.type_str = qapi_dealloc_type_str; + v->visitor.type_number = qapi_dealloc_type_number; + + QTAILQ_INIT(&v->stack); + + return v; +} diff --git a/qapi/qapi-dealloc-visitor.h b/qapi/qapi-dealloc-visitor.h new file mode 100644 index 0000000..5842bc7 --- /dev/null +++ b/qapi/qapi-dealloc-visitor.h @@ -0,0 +1,26 @@ +/* + * Dealloc Visitor + * + * Copyright IBM, Corp. 2011 + * + * Authors: + * Michael Roth <mdroth@linux.vnet.ibm.com> + * + * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. + * See the COPYING.LIB file in the top-level directory. + * + */ + +#ifndef QAPI_DEALLOC_VISITOR_H +#define QAPI_DEALLOC_VISITOR_H + +#include "qapi-visit-core.h" + +typedef struct QapiDeallocVisitor QapiDeallocVisitor; + +QapiDeallocVisitor *qapi_dealloc_visitor_new(void); +void qapi_dealloc_visitor_cleanup(QapiDeallocVisitor *d); + +Visitor *qapi_dealloc_get_visitor(QapiDeallocVisitor *v); + +#endif |