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Make errno a thread-local variable.

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errno is supposed to be thread local and we do that here in a rather
makeshift way by implementing a function that returns a pointer to
the __errno variable in the thread block.

If more serious TLS is required, perhaps it would be worthwhile
implementing it using the linker and the "__thread" storage attribute.
That's a bit overkill just for this. I'm also not liking what I saw
the compiler producing.

Change-Id: I03bc0bd6a89f6e3d6bae7653284ee01054614f9a
Reviewed-on: http://gerrit.rockbox.org/803
Reviewed-by: Michael Sevakis <jethead71@rockbox.org>
Tested: Michael Sevakis <jethead71@rockbox.org>
This commit is contained in:
Michael Sevakis 2014-04-28 09:15:06 -04:00
parent f444ae70eb
commit 355b5406fa
5 changed files with 14 additions and 7 deletions
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6
apps/plugin.h
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@ -160,12 +160,12 @@ void* plugin_get_buffer(size_t *buffer_size);
#define PLUGIN_MAGIC 0x526F634B /* RocK */
/* increase this every time the api struct changes */
#define PLUGIN_API_VERSION 229
#define PLUGIN_API_VERSION 230
/* update this to latest version if a change to the api struct breaks
backwards compatibility (and please take the opportunity to sort in any
new function which are "waiting" at the end of the function table) */
#define PLUGIN_MIN_API_VERSION 228
#define PLUGIN_MIN_API_VERSION 230
/* plugin return codes */
/* internal returns start at 0x100 to make exit(1..255) work */
@ -829,7 +829,7 @@ struct plugin_api {
/* misc */
#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
int* __errno;
int * (*__errno)(void);
#endif
void (*srand)(unsigned int seed);
int (*rand)(void);