qemu/fsdev/p9array.h

2  * P9Array - deep auto free C-array
12  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
17  * all copies or substantial portions of the Software.
19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
28 #define QEMU_P9ARRAY_H
31  * P9Array provides a mechanism to access arrays in common C-style (e.g. by
52  *     free(foo->s);
82  * P9ARRAY_DECLARE_TYPE() - Declares an array type for the passed @scalar_type.
88 #define P9ARRAY_DECLARE_TYPE(scalar_type) \
90         size_t len; \
94     void p9array_new_##scalar_type(scalar_type **auto_var, size_t len); \
98  * P9ARRAY_DEFINE_TYPE() - Defines an array type for the passed @scalar_type
107 #define P9ARRAY_DEFINE_TYPE(scalar_type, scalar_cleanup_func) \
108     void p9array_new_##scalar_type(scalar_type **auto_var, size_t len) \
112             len * sizeof(scalar_type)); \
113         arr->len = len; \
114         *auto_var = &arr->first[0]; \
124             ((char *)first) - offsetof(P9Array##scalar_type, first) \
126         for (size_t i = 0; i < arr->len; ++i) { \
127             scalar_cleanup_func(&arr->first[i]); \
133  * P9ARRAY_REF() - Declare a reference variable for an array.
141 #define P9ARRAY_REF(scalar_type) \
145  * P9ARRAY_NEW() - Allocate a new array.
149  * @len: amount of array elements to be allocated immediately
151  * Allocates a new array of passed @scalar_type with @len number of array
155 #define P9ARRAY_NEW(scalar_type, auto_var, len) \  argument
160     p9array_new_##scalar_type((&auto_var), len)