Summary:
Patch 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
EAPI is the only solution that worked for MSVC.
Co-authored-by: João Paulo Taylor Ienczak Zanette <jpaulotiz@gmail.com>
Co-authored-by: Ricardo Campos <ricardo.campos@expertise.dev>
Co-authored-by: Lucas Cavalcante de Sousa <lucks.sousa@gmail.com>
Reviewers: jptiz, lucas, woohyun, vtorri, raster
Reviewed By: jptiz, lucas, vtorri
Subscribers: ProhtMeyhet, cedric, #reviewers, #committers
Tags: #efl
Differential Revision: https://phab.enlightenment.org/D12188
`strerror_s` is the windows alternative of `strerror_r` used by EFL.
`strerror_s` never return the error code with the message as
`strerror_r` does, because of that, while comparing the first 14
characters of `Unknown error ` to the message from unknown code 4096
(`Unknown error`) they were accusing being different - in UNIX this
works because the message returned is `Unknown error 4096`.
This error was noticeable at `eina_error_test_failures` test case.
This Diff adds the error code to the message in case of an `Unknown
error`, making the windows implementation compliant with UNIX.
Reviewed-by: Vincent Torri <vincent.torri@gmail.com>
Reviewed-by: Wander Lairson Costa <wander.lairson@gmail.com>
Reviewed-by: Stefan Schmidt <stefan@datenfreihafen.org>
Differential Revision: https://phab.enlightenment.org/D12033
Summary: strerror_r() does not exist on Windows, but strerror_s() does
Test Plan: compilation
Reviewers: cedric, bu5hm4n, zmike
Reviewed By: zmike
Subscribers: zmike, bu5hm4n, #reviewers, #committers
Tags: #efl
Differential Revision: https://phab.enlightenment.org/D8279
eina_error_msg_get() must return NULL if an incorrect error is provided.
The XSI strerror_r() returns EINVAL when an invalid error is passed to
it, so we can end the function here. If we kept on, we would have tested
against the 'unknown_prefix' ("Unknown error ") which is implementation
defined, and registered a new error when the invalid error message
didn't match the 'unknown_prefix'. This new error message would have
been returned, which is not what we expected.
This case arised on Mac OS X where the 'unkwown prefix' is
"Unknown error: " instead of "Unknown error ".
It fixes eina test suite on Mac OS X.
As pointed out in the mailing list, it was introduced in this release,
so it's better to remove the symbol instead of deprecating it.
People should use ETIMEDOUT directly.
So, first, the wrong strerror_r() was detected on
Mac OS X. Instead of using a complex set of macros
to try to detect which strerror_r() to use, when
it is defined, let the autotools handle that clerverness
for us.
we have some duplication of errors between Eina_Error and errno.h,
however we should use Eina_Error to extend the traditional errno.h
system.
then change eina_error_msg_register() and
eina_error_msg_static_register() to return a magic bit to state the
number was registered, and on other functions test this bit in order
to operate on registered values, otherwise fallback to errno.h, such
as strerror().
It also deprecates 2 clear duplicated errors:
- EINA_ERROR_OUT_OF_MEMORY -> ENOMEM
- EINA_ERROR_TIMEOUT -> ETIMEDOUT
There are two details when using strerror():
- old behavior did not return strings for non-error, such as
"Success" or "Unknown error ${N}"
- thread-safety issues: since we must be thread safe, then use
strerror_r() and eina_stringshare_add() that value, keeping a hash
of cached values
Felipe Magno de Almeida
Lucas Cavalcante de Sousa
Vincent Torri
Jean Guyomarc'h
Gustavo Sverzut Barbieri
Jean-Philippe Andre
Cedric BAIL