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libc/stdio: Generate the dummy atexit and on_exit

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since the compiler may generate the code call atexit automatically

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao 2022-06-07 14:08:03 +08:00 committed by Petro Karashchenko
parent 183da24fc5
commit 5b165a2294
2 changed files with 33 additions and 37 deletions
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6
libs/libc/stdlib/Make.defs
View File

@ -27,11 +27,7 @@ CSRCS += lib_rand.c lib_qsort.c lib_srand.c lib_strtol.c
CSRCS += lib_strtoll.c lib_strtoul.c lib_strtoull.c lib_strtod.c lib_strtof.c
CSRCS += lib_strtold.c lib_checkbase.c lib_mktemp.c lib_mkstemp.c lib_mkdtemp.c
CSRCS += lib_aligned_alloc.c lib_posix_memalign.c lib_valloc.c
CSRCS += lib_cxa_atexit.c
ifneq ($(CONFIG_LIBC_MAX_EXITFUNS),0)
CSRCS += lib_atexit.c lib_onexit.c
endif
CSRCS += lib_atexit.c lib_cxa_atexit.c lib_onexit.c
ifeq ($(CONFIG_LIBC_WCHAR),y)
CSRCS += lib_mblen.c lib_mbtowc.c lib_wctomb.c

64
libs/libc/stdlib/lib_atexit.c
View File

@ -30,9 +30,7 @@
#include <nuttx/semaphore.h>
#include <nuttx/tls.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#if CONFIG_LIBC_MAX_EXITFUNS > 0
/****************************************************************************
* Private Functions
@ -103,35 +101,6 @@ static void exitfunc_unlock(void)
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: atexit
*
* Description:
* Registers a function to be called at program exit.
* The atexit() function registers the given function to be called
* at normal process termination, whether via exit or via return from
* the program's main().
*
* Limitations in the current implementation:
*
* 1. Only a single atexit function can be registered unless
* CONFIG_LIBC_MAX_EXITFUNS defines a larger number.
* 2. atexit functions are not inherited when a new task is
* created.
*
* Input Parameters:
* func - A pointer to the function to be called when the task exits.
*
* Returned Value:
* Zero on success. Non-zero on failure.
*
****************************************************************************/
int atexit(CODE void (*func)(void))
{
return atexit_register(ATTYPE_ATEXIT, func, NULL, NULL);
}
int atexit_register(int type, CODE void (*func)(void), FAR void *arg,
FAR void *dso)
{
@ -219,3 +188,34 @@ void atexit_call_exitfuncs(int status)
}
}
}
#endif
/****************************************************************************
* Name: atexit
*
* Description:
* Registers a function to be called at program exit.
* The atexit() function registers the given function to be called
* at normal process termination, whether via exit or via return from
* the program's main().
*
* Limitations in the current implementation:
*
* 1. Only a single atexit function can be registered unless
* CONFIG_LIBC_MAX_EXITFUNS defines a larger number.
* 2. atexit functions are not inherited when a new task is
* created.
*
* Input Parameters:
* func - A pointer to the function to be called when the task exits.
*
* Returned Value:
* Zero on success. Non-zero on failure.
*
****************************************************************************/
int atexit(CODE void (*func)(void))
{
return atexit_register(ATTYPE_ATEXIT, func, NULL, NULL);
}