Adds support for POSIX interface open_memstream() that allows writing
to dynamic memory buffer stream. The stream is dynamically reallocated
as the buffer grows with initial size set to zero.
The caller has to free the buffer after the stream is closed.
The implementation uses fopencookie() for custom stream operations and
callbacks.
Signed-off-by: Michal Lenc <michallenc@seznam.cz>
This moves all the public POSIX semaphore functions into libc and with
this most of the user-space logic is also moved; namely cancel point and
errno handling.
This also removes the need for the _SEM_XX macros used to differentiate
which API is used per user-/kernel mode. Such macros are henceforth
unnecessary.
PR #11165 causes an unnecessary regression; task_delete no longer works,
if the deleted task is from another group.
The logic that prevents this comes from:
nxnotify_cancellation() ->
tls_get_info_pid() ->
nxsched_get_stackinfo()
Which checks for permissions, which does not make sense in this case since
it is the kernel asking for the stack information.
Fix this by partially reverting 11165 and implementing a direct path for
the kernel to query for any tasks TLS.
This moves task / thread cancel point logic from the NuttX kernel into
libc, while the data needed by the cancel point logic is moved to TLS.
The change is an enabler to move user-space APIs to libc as well, for
a coherent user/kernel separation.
Add a minimal implementation to suppress warnings when building
application code shared with other operating systems.
For example:
When building with a c++ compiler and GCC 12.2.0, the following warning is emitted:
nuttx/include/spawn.h:178:40: warning: statement has no effect [-Wunused-value]
178 | #define posix_spawnattr_destroy(attr) (0)
Add support for POSIX interface fmemopen(). This interface open a memory
buffer as a stream and permits access to this buffer specified by mode.
This allows I/O operations to be performed on the memory buffer.
The implementation uses fopencookie() for custom stream operations and
callbacks.
Signed-off-by: Michal Lenc <michallenc@seznam.cz>
CPP: nuttx-names.in-> nuttx-names.dat
LD: nuttx
/usr/lib/gcc/x86_64-pc-msys/13.2.0/../../../../x86_64-pc-msys/bin/ld: nuttx.rel:/d/a/nuttx_windows/nuttx_windows/nuttxspace/nuttx/libs/libc/stdlib/lib_exit.c:48: multiple definition of `__dso_handle'; /usr/lib/gcc/x86_64-pc-msys/13.2.0/crtbegin.o:cygming-crtbeg:(.data+0x0): first defined here
CC: icmp/icmp_input.c modlib/modlib_load.c: In function 'modlib_elfsize':
modlib/modlib_load.c:87:30: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
87 | textaddr = (FAR void *)phdr->p_vaddr;
| ^
cc1: all warnings being treated as errors
Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
modlib/modlib_symbols.c: In function ‘modlib_symcallback’:
modlib/modlib_symbols.c:215:13: warning: implicit declaration of function ‘modlib_depend’; did you mean ‘modlib_read’? [-Wimplicit-function-declaration]
215 | ret = modlib_depend(exportinfo->modp, modp);
| ^~~~~~~~~~~~~
| modlib_read
Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
CP: nuttx/include/nuttx/config.h
modlib/modlib_init.c:53: warning: "modlib_dumpbuffer" redefined
53 | # define modlib_dumpbuffer(m,b,n) binfodumpbuffer(m,b,n)
|
In file included from modlib/modlib_init.c:36:
nuttx/include/nuttx/lib/modlib.h:64: note: this is the location of the previous definition
64 | # define modlib_dumpbuffer(m,b,n) sinfodumpbuffer(m,b,n)
|
Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
__dtoa is not used because currently NuttX uses other
function called __dtoa_engine() to do the same thing
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit adds support for custom stream via fopencookie function.
The function allows the programmer the create his own custom stream
for IO operations and hook his custom functions to it.
This is a non POSIX interface defined in Standard C library and implemented
according to it. The only difference is in usage of off_t instead of
off64_t. Programmer can use 64 bits offset if CONFIG_FS_LARGEFILE is
enabled. In that case off_t is defined as int64_t (int32_t otherwise).
Field fs_fd is removed from file_struct and fs_cookie is used instead
as a shared variable for file descriptor or user defined cookie.
The interface will be useful for future fmemopen implementation.
Signed-off-by: Michal Lenc <michallenc@seznam.cz>
both functions aren't suitable to be put into libc,
because they call the kernel internal functions directly.
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
https://man7.org/linux/man-pages/man2/memfd_create.2.html:
The name supplied in name is used as a filename and will be
displayed as the target of the corresponding symbolic link in the
directory /proc/self/fd/. The displayed name is always prefixed
with memfd: and serves only for debugging purposes. Names do not
affect the behavior of the file descriptor, and as such multiple
files can have the same name without any side effects.
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
For programs with the dependencies logic in pthread_once callback , using global locks may cause deadlock:
task A
pthread_once()
|
|-> nxrmutex_lock(&g_lock);
-> init_routine(); // callback to wait task B
task B
pthread_once()
|
->nxrmutex_lock(&g_lock); // Deadlock
->init_routine(); // hold resource to wake up task A
Signed-off-by: hujun5 <hujun5@xiaomi.com>
Domain name has the similar layout as file path, so it's too small
to use 32 bytes as the default value, and better to has the same
default value as PATH_MAX which is 255.
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
