implement sys/uio/writev according to POSIX standard. This vectorized IO
API is needed by many logging libraries to achieve atomic logging
multiple strings.
While working on strftime I noticed some constants were being defined in
unexpected places. One thing led to another, and I ended up doing a
major cleanup of the time functions.
What's included:
All uses of <time.h> in /src and /test removed (except for LibcTest.cpp)
The various time constants have been moved to time_constants.h, and the
`time_constants` namespace.
struct tm gets its own type indirection header now.
Summary:
This is installed unconditionally because of the dependency in the
`hdr/` directory. Remove this so it's only used on the systems that need
it.
Add a `clock_gettime` emulation layer and use it to implement the `time`
entrypoint.
For windows, the monotonic clock is emulated using `QPC`.
The realtime clock is emulated using `GetSystemTimePreciseAsFileTime`.
The proxy header definition for mode_t was using an incorrect form for
its dependency on fcntl_overlay. The relative paths for dependencies can
only go down, not up so "../" doesn't work. This patch fixes it to be
absolute.
This patch adds the necessary functions to send and receive messages
over a socket. Those functions are: recv, recvfrom, recvmsg, send,
sendto, sendmsg, and socketpair for testing.
Added proxy header for the jmp_buf type and changed all use instances
from __jmp_buf * to the typedef alias jmp_buf , fixed the link to LLVM
in stack_t.h description
Summary:
This patch adds the macros and entrypoints associated with the
`locale.h` entrypoints. These are mostly stubs, as we (for now and the
forseeable future) only expect to support the C and maybe C.UTF-8
locales in the LLVM libc.
Summary:
This patch adds all the libc ctype variants. These ignore the locale
ingormation completely, so they're pretty much just stubs. Because these
use locale information, which is system scope, we do not enable building
them outisde of full build mode.
reland of https://github.com/llvm/llvm-project/pull/98215
Additionally adds proxy headers for FILE and the fopencookie types
The arm32 build has been failing due to redefinitions of the off_t type.
This patch fixes this by moving off_t to a proper proxy header. To do
this, it also moves stdio macros to a proxy header to hopefully avoid
including this proxy header alongside this public stdio.h.
The arm32 build has been failing due to redefinitions of the off_t type.
This patch fixes this by moving off_t to a proper proxy header. To do
this, it also moves stdio macros to a proxy header to hopefully avoid
including this proxy header alongside this public stdio.h.
- added at_quick_exit function
- used helper file exit_handler which reuses code from atexit
- atexit now calls helper functions from exit_handler
- test cases and dependencies are added
---------
Co-authored-by: Aaryan Shukla <aaryanshukla@google.com>
When supporting "overlay" vs "fullbuild" modes, "what ABI are you
using?" becomes a fundamental question to have concrete answers for.
Overlay mode MUST match the ABI of the system being overlayed onto;
fullbuild more flexible (the only system ABI relevant is the OS kernel).
When implementing llvm-libc we generally prefer the include-what-you use
style of avoiding transitive dependencies (since that makes refactoring
headers more painful, and slows down build times). So what header do you
include for any given type or function declaration? For any given
userspace program, the answer is straightforward. But for llvm-libc
which is trying to support multiple ABIs (at least one per
configuration), the answer is perhaps less clear.
This proposal seeks to add one layer of indirection relative to what's
being done today.
It then converts users of sigset_t and struct epoll_event and the epoll
implemenations over to this convention as an example.
