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Allow to use NULL as free function for image attached data.

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This commit is contained in:
Vreixo Formoso 2008-02-07 12:31:09 +01:00
parent ec7fc7d1b2
commit ae004b1bfc
2 changed files with 12 additions and 9 deletions
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15
libisofs/image.c
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@ -94,7 +94,7 @@ void iso_image_unref(IsoImage *image)
int nexcl; int nexcl;
/* we need to free the image */ /* we need to free the image */
if (image->user_data != NULL) { if (image->user_data_free != NULL) {
/* free attached data */ /* free attached data */
image->user_data_free(image->user_data); image->user_data_free(image->user_data);
} }
@ -129,12 +129,12 @@ void iso_image_unref(IsoImage *image)
* @param data * @param data
* Pointer to application defined data that will be attached to the * Pointer to application defined data that will be attached to the
* image. You can pass NULL to remove any already attached data. * image. You can pass NULL to remove any already attached data.
* @param free * @param give_up
* Function that will be called when the image does not need the data * Function that will be called when the image does not need the data
* any more. It receives the data pointer as an argumente, and eventually * any more. It receives the data pointer as an argumente, and eventually
* causes data to be free. * causes data to be free. It can be NULL if you don't need it.
*/ */
int iso_image_attach_data(IsoImage *image, void *data, void (*free)(void*)) int iso_image_attach_data(IsoImage *image, void *data, void (*give_up)(void*))
{ {
if (image == NULL || (data != NULL && free == NULL)) { if (image == NULL || (data != NULL && free == NULL)) {
return ISO_NULL_POINTER; return ISO_NULL_POINTER;
@ -142,13 +142,16 @@ int iso_image_attach_data(IsoImage *image, void *data, void (*free)(void*))
if (image->user_data != NULL) { if (image->user_data != NULL) {
/* free previously attached data */ /* free previously attached data */
image->user_data_free(image->user_data); if (image->user_data_free) {
image->user_data_free(image->user_data);
}
image->user_data = NULL; image->user_data = NULL;
image->user_data_free = NULL;
} }
if (data != NULL) { if (data != NULL) {
image->user_data = data; image->user_data = data;
image->user_data_free = free; image->user_data_free = give_up;
} }
return ISO_SUCCESS; return ISO_SUCCESS;
} }

6
libisofs/libisofs.h
View File

@ -1344,16 +1344,16 @@ void iso_image_unref(IsoImage *image);
* @param data * @param data
* Pointer to application defined data that will be attached to the * Pointer to application defined data that will be attached to the
* image. You can pass NULL to remove any already attached data. * image. You can pass NULL to remove any already attached data.
* @param free * @param give_up
* Function that will be called when the image does not need the data * Function that will be called when the image does not need the data
* any more. It receives the data pointer as an argumente, and eventually * any more. It receives the data pointer as an argumente, and eventually
* causes data to be free. * causes data to be freed. It can be NULL if you don't need it.
* @return * @return
* 1 on succes, < 0 on error * 1 on succes, < 0 on error
* *
* @since 0.6.2 * @since 0.6.2
*/ */
int iso_image_attach_data(IsoImage *image, void *data, void (*free)(void*)); int iso_image_attach_data(IsoImage *image, void *data, void (*give_up)(void*));
/** /**
* The the data previously attached with iso_image_attach_data() * The the data previously attached with iso_image_attach_data()