efl/src/tests/eolian/data/owning_ref.c

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void _owning_test1(Eo *obj, Owning_Data *pd, Eina_List *test1, Eina_Iterator *test2, Eina_Hash *test3, Eina_Accessor *test4);
static void
_owning_test1_ownership_fallback(Eina_List *test1, Eina_Iterator *test2, Eina_Hash *test3, Eina_Accessor *test4)
{
eina_list_free(test1);
eina_iterator_free(test2);
eina_hash_free_cb_set(test3,NULL);
eina_hash_free(test3);
eina_accessor_free(test4);
}
eolian: Add -e parameter to pass export symbol to eolian generator Summary: Eolian generator must have a parameter so it can generate the correct symbol export/import macro for the API generated. This makes it possible to define the symbols as being local to a single DSO without the need to guard the generated headers or generated source files with #define and #undef preprocessor statements. = The Rationale = This patch is from a series of patches to rename EAPI symbols to specific library DSOs. EAPI was designed to be able to pass `__attribute__ ((visibility ("default")))` for symbols with GCC, which would mean that even if -fvisibility=hidden was used when compiling the library, the needed symbols would get exported. MSVC __almost__ works like GCC (or mingw) in which you can declare everything as export and it will just work (slower, but it will work). But there's a caveat: global variables will not work the same way for MSVC, but works for mingw and GCC. For global variables (as opposed to functions), MSVC requires correct DSO visibility for MSVC: instead of declaring a symbol as export for everything, you need to declare it as import when importing from another DSO and export when defining it locally. With current EAPI definitions, we get the following example working in mingw and MSVC (observe it doesn't define any global variables as exported symbols). Example 1: dll1: ``` EAPI void foo(void); EAPI void bar() { foo(); } ``` dll2: ``` EAPI void foo() { printf ("foo\n"); } ``` This works fine with API defined as __declspec(dllexport) in both cases and for gcc defining as `__atttribute__((visibility("default")))`. However, the following: Example 2: dll1: ``` EAPI extern int foo; EAPI void foobar(void); EAPI void bar() { foo = 5; foobar(); } ``` dll2: ``` EAPI int foo = 0; EAPI void foobar() { printf ("foo %d\n", foo); } ``` This will work on mingw but will not work for MSVC. And that's why LIBAPI is the only solution that works for MSVC. Co-authored-by: João Paulo Taylor Ienczak Zanette <jpaulotiz@gmail.com> Co-authored-by: Lucas Cavalcante de Sousa <lucks.sousa@gmail.com> Co-authored-by: Ricardo Campos <ricardo.campos@expertise.dev> Reviewers: q66, vtorri, woohyun, jptiz, lucas Reviewed By: vtorri, lucas Subscribers: cedric, #reviewers, #committers Tags: #efl Differential Revision: https://phab.enlightenment.org/D12197
2020-12-04 05:27:52 -08:00
EAPI EAPI_WEAK EFL_VOID_FUNC_BODYV_FALLBACK(owning_test1, _owning_test1_ownership_fallback(test1, test2, test3, test4);, EFL_FUNC_CALL(test1, test2, test3, test4), Eina_List *test1, Eina_Iterator *test2, Eina_Hash *test3, Eina_Accessor *test4);
void _owning_test2(Eo *obj, Owning_Data *pd, Eina_List *test1, Eina_Hash *test2);
static void
_owning_test2_ownership_fallback(Eina_List *test1, Eina_Hash *test2)
{
Eina_Array *test1_iter;
EINA_LIST_FREE(test1,test1_iter)
{
eina_array_free(test1_iter);
}
eina_hash_free_cb_set(test2,NULL);
eina_hash_free(test2);
}
eolian: Add -e parameter to pass export symbol to eolian generator Summary: Eolian generator must have a parameter so it can generate the correct symbol export/import macro for the API generated. This makes it possible to define the symbols as being local to a single DSO without the need to guard the generated headers or generated source files with #define and #undef preprocessor statements. = The Rationale = This patch is from a series of patches to rename EAPI symbols to specific library DSOs. EAPI was designed to be able to pass `__attribute__ ((visibility ("default")))` for symbols with GCC, which would mean that even if -fvisibility=hidden was used when compiling the library, the needed symbols would get exported. MSVC __almost__ works like GCC (or mingw) in which you can declare everything as export and it will just work (slower, but it will work). But there's a caveat: global variables will not work the same way for MSVC, but works for mingw and GCC. For global variables (as opposed to functions), MSVC requires correct DSO visibility for MSVC: instead of declaring a symbol as export for everything, you need to declare it as import when importing from another DSO and export when defining it locally. With current EAPI definitions, we get the following example working in mingw and MSVC (observe it doesn't define any global variables as exported symbols). Example 1: dll1: ``` EAPI void foo(void); EAPI void bar() { foo(); } ``` dll2: ``` EAPI void foo() { printf ("foo\n"); } ``` This works fine with API defined as __declspec(dllexport) in both cases and for gcc defining as `__atttribute__((visibility("default")))`. However, the following: Example 2: dll1: ``` EAPI extern int foo; EAPI void foobar(void); EAPI void bar() { foo = 5; foobar(); } ``` dll2: ``` EAPI int foo = 0; EAPI void foobar() { printf ("foo %d\n", foo); } ``` This will work on mingw but will not work for MSVC. And that's why LIBAPI is the only solution that works for MSVC. Co-authored-by: João Paulo Taylor Ienczak Zanette <jpaulotiz@gmail.com> Co-authored-by: Lucas Cavalcante de Sousa <lucks.sousa@gmail.com> Co-authored-by: Ricardo Campos <ricardo.campos@expertise.dev> Reviewers: q66, vtorri, woohyun, jptiz, lucas Reviewed By: vtorri, lucas Subscribers: cedric, #reviewers, #committers Tags: #efl Differential Revision: https://phab.enlightenment.org/D12197
2020-12-04 05:27:52 -08:00
EAPI EAPI_WEAK EFL_VOID_FUNC_BODYV_FALLBACK(owning_test2, _owning_test2_ownership_fallback(test1, test2);, EFL_FUNC_CALL(test1, test2), Eina_List *test1, Eina_Hash *test2);
static Eina_Bool
_owning_class_initializer(Efl_Class *klass)
{
const Efl_Object_Ops *opsp = NULL;
const Efl_Object_Property_Reflection_Ops *ropsp = NULL;
#ifndef OWNING_EXTRA_OPS
#define OWNING_EXTRA_OPS
#endif
EFL_OPS_DEFINE(ops,
EFL_OBJECT_OP_FUNC(owning_test1, _owning_test1),
EFL_OBJECT_OP_FUNC(owning_test2, _owning_test2),
OWNING_EXTRA_OPS
);
opsp = &ops;
return efl_class_functions_set(klass, opsp, ropsp);
}
static const Efl_Class_Description _owning_class_desc = {
EO_VERSION,
"Owning",
EFL_CLASS_TYPE_REGULAR,
sizeof(Owning_Data),
_owning_class_initializer,
NULL,
NULL
};
EFL_DEFINE_CLASS(owning_class_get, &_owning_class_desc, NULL, NULL);