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props: improve unset mask

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Add support for more than 32 properties
This commit is contained in:
Wim Taymans 2016-08-29 10:44:41 +02:00
parent c8830adaa3
commit 80ed927885
2 changed files with 19 additions and 4 deletions
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17
spa/include/spa/props.h
View file

@ -139,6 +139,14 @@ typedef struct {
const char **tags;
} SpaPropInfo;
/**
* SpaPropValue:
* @type: a property type
* @size: the property size
* @value: the property value.
*
* The structure to set and get properties.
*/
typedef struct {
SpaPropType type;
size_t size;
@ -150,7 +158,10 @@ typedef struct {
* @n_prop_info: number of elements in @prop_info
* @prop_info: array of #SpaPropInfo. Contains info about the
* properties. Can be %NULL when unspecified.
* @unset_mask: mask of unset properties
* @unset_mask: mask of unset properties. For each property in @prop_info there
* is a corresponding bit that specifies if the property is currently
* unset. When more that 32 properties are present, more uint32_t
* fields follow this one.
*
* Generic propertiers.
*/
@ -160,6 +171,10 @@ struct _SpaProps {
uint32_t unset_mask;
};
#define SPA_PROPS_INDEX_IS_UNSET(p,idx) ((&(p)->unset_mask)[(idx) >> 5] & (1U << ((idx) & 31)))
#define SPA_PROPS_INDEX_UNSET(p,idx) ((&(p)->unset_mask)[(idx) >> 5] |= (1U << ((idx) & 31)))
#define SPA_PROPS_INDEX_SET(p,idx) ((&(p)->unset_mask)[(idx) >> 5] &= ~(1U << ((idx) & 31)))
static inline unsigned int
spa_props_index_for_id (const SpaProps *props, uint32_t id)
{

6
spa/lib/props.c
View file

@ -46,7 +46,7 @@ spa_props_set_prop (SpaProps *props,
memcpy (SPA_MEMBER (props, info->offset, void), value->value, value->size);
props->unset_mask &= ~(1u << index);
SPA_PROPS_INDEX_SET (props, index);
return SPA_RESULT_OK;
}
@ -68,7 +68,7 @@ spa_props_get_prop (const SpaProps *props,
if ((info->flags & SPA_PROP_FLAG_READABLE) == 0)
return SPA_RESULT_INVALID_PROPERTY_ACCESS;
if (props->unset_mask & (1u << index))
if (SPA_PROPS_INDEX_IS_UNSET (props, index))
return SPA_RESULT_PROPERTY_UNSET;
value->type = info->type;
@ -103,7 +103,7 @@ spa_props_copy (const SpaProps *src,
memcpy (SPA_MEMBER (dest, info->offset, void), value.value, value.size);
dest->unset_mask &= ~(1u << i);
SPA_PROPS_INDEX_SET (dest, i);
}
return SPA_RESULT_OK;
}