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libdl: Clear error between dlerror invocations

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Updates #2747
This commit is contained in:
Patrick Gauvin
2016-06-26 12:43:25 -04:00
committed by Chris Johns
parent 1a304307a2
commit a2a9751823
3 changed files with 19 additions and 0 deletions
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2
cpukit/libdl/dlfcn.c
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@@ -18,6 +18,7 @@
#include <stdint.h>
#include <dlfcn.h>
#include <rtems/rtl/rtl.h>
#include "rtl-error.h"
static rtems_rtl_obj_t*
dl_get_obj_from_handle (void* handle)
@@ -130,6 +131,7 @@ dlerror (void)
{
static char msg[64];
rtems_rtl_get_error (msg, sizeof (msg));
rtems_rtl_clear_error ();
return msg;
}

12
cpukit/libdl/rtl-error.c
View File

@@ -52,3 +52,15 @@ rtems_rtl_get_error (char* message, size_t max_message)
return EIO;
}
void
rtems_rtl_clear_error (void)
{
rtems_rtl_data_t* rtl = rtems_rtl_lock ();
if (rtl != NULL)
{
rtl->last_errno = 0;
rtl->last_error[0] = '\0';
rtems_rtl_unlock ();
}
}

5
cpukit/libdl/rtl-error.h
View File

@@ -37,6 +37,11 @@ extern "C" {
*/
void rtems_rtl_set_error (int error, const char* format, ...) RTEMS_RTL_PRINTF_ATTR;
/**
* Clears the error.
*/
void rtems_rtl_clear_error (void);
#ifdef __cplusplus
}
#endif /* __cplusplus */