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LibC: Mark a bunch of functions as cancellation points

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Tim Schumacher 2022-06-12 15:15:09 +02:00 • committed by Brian Gianforcaro
parent 899fd74f8e
commit c85f307e62
15 changed files with 78 additions and 0 deletions
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13
Userland/Libraries/LibC/unistd.cpp
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@ -10,6 +10,7 @@
#include <AK/Vector.h>
#include <alloca.h>
#include <assert.h>
#include <bits/pthread_cancel.h>
#include <bits/pthread_integration.h>
#include <dirent.h>
#include <errno.h>
@ -374,6 +375,8 @@ pid_t getpgrp()
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/read.html
ssize_t read(int fd, void* buf, size_t count)
{
__pthread_maybe_cancel();
int rc = syscall(SC_read, fd, buf, count);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
@ -381,6 +384,8 @@ ssize_t read(int fd, void* buf, size_t count)
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/pread.html
ssize_t pread(int fd, void* buf, size_t count, off_t offset)
{
__pthread_maybe_cancel();
int rc = syscall(SC_pread, fd, buf, count, &offset);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
@ -388,6 +393,8 @@ ssize_t pread(int fd, void* buf, size_t count, off_t offset)
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/write.html
ssize_t write(int fd, void const* buf, size_t count)
{
__pthread_maybe_cancel();
int rc = syscall(SC_write, fd, buf, count);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
@ -395,6 +402,8 @@ ssize_t write(int fd, void const* buf, size_t count)
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/pwrite.html
ssize_t pwrite(int fd, void const* buf, size_t count, off_t offset)
{
__pthread_maybe_cancel();
// FIXME: This is not thread safe and should be implemented in the kernel instead.
off_t old_offset = lseek(fd, 0, SEEK_CUR);
lseek(fd, offset, SEEK_SET);
@ -484,6 +493,8 @@ char* ttyname(int fd)
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/close.html
int close(int fd)
{
__pthread_maybe_cancel();
int rc = syscall(SC_close, fd);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
@ -891,6 +902,8 @@ int sysbeep()
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/fsync.html
int fsync(int fd)
{
__pthread_maybe_cancel();
int rc = syscall(SC_fsync, fd);
__RETURN_WITH_ERRNO(rc, rc, -1);
}