93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/*
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* Copyright 2019 by its authors. See AUTHORS.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "Eina.h"
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#ifdef EAPI
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# undef EAPI
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#endif
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#ifdef _WIN32
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# define EAPI __declspec(dllexport)
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#else
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# ifdef __GNUC__
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# if __GNUC__ >= 4
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# define EAPI __attribute__ ((visibility("default")))
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# else
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# define EAPI
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# endif
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# else
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# define EAPI
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# endif
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#endif /* ! _WIN32 */
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// This just a wrapper around carray acessors for pinned managed data
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// It uses the free callback to unpin the managed data so it can be
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// reclaimed by the GC back in C# world.
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struct _Eina_Mono_Owned_Accessor
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{
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Eina_Accessor accessor;
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Eina_Accessor *carray_acc;
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void *free_data;
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Eina_Free_Cb free_cb;
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};
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typedef struct _Eina_Mono_Owned_Accessor Eina_Mono_Owned_Accessor;
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static Eina_Bool eina_mono_owned_carray_get_at(Eina_Mono_Owned_Accessor *accessor, unsigned int idx, void **data)
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{
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return eina_accessor_data_get(accessor->carray_acc, idx, data);
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}
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static void** eina_mono_owned_carray_get_container(Eina_Mono_Owned_Accessor *accessor)
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{
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// Is another accessor a valid container?
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return (void**)&accessor->carray_acc;
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}
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static void eina_mono_owned_carray_free_cb(Eina_Mono_Owned_Accessor* accessor)
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{
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accessor->free_cb(accessor->free_data);
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free(accessor->carray_acc); // From Eina_CArray_Length_Accessor implementation...
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free(accessor);
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}
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EAPI Eina_Accessor *eina_mono_owned_carray_length_accessor_new(void** array, unsigned int step, unsigned int length, Eina_Free_Cb free_cb, void *handle)
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{
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Eina_Mono_Owned_Accessor *accessor = calloc(1, sizeof(Eina_Mono_Owned_Accessor));
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if (!accessor) return NULL;
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EINA_MAGIC_SET(&accessor->accessor, EINA_MAGIC_ACCESSOR);
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accessor->carray_acc = eina_carray_length_accessor_new(array, step, length);
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accessor->accessor.version = EINA_ACCESSOR_VERSION;
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accessor->accessor.get_at = FUNC_ACCESSOR_GET_AT(eina_mono_owned_carray_get_at);
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accessor->accessor.get_container = FUNC_ACCESSOR_GET_CONTAINER(eina_mono_owned_carray_get_container);
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accessor->accessor.free = FUNC_ACCESSOR_FREE(eina_mono_owned_carray_free_cb);
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// The managed callback to be called with the pinned data.
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accessor->free_cb = free_cb;
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// The managed pinned data to be unpinned.
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accessor->free_data = handle;
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return &accessor->accessor;
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} |