vasilito
068a1ca63e
Bootloader fork rebase:
- Base changed from 0.1.0 pre-patched archive to upstream 1.0.0 tag (c7eeb9f)
- Applied 0001-redbear-local-forks.patch (Cargo.toml crate path redirects)
- Applied fix-uefi-alloc-panic.patch equivalents (4 panic!() -> graceful
error handling in src/main.rs)
- Applied P5-live-preload-cap-1gib.patch (1 GiB cap on live image preload)
- Skipped: P0 GPT partition scan (requires new module + integration),
P1 timeout/default-resolution, P2 live preload guard (subsumed by
panic fixes + cap), P3 live image safe read, P4 large ISO boot,
redox.patch — to be applied in dedicated rebase session.
firmware-loader/Cargo.toml: version 0.1.0 -> 0.3.0 (sync with other
Red Bear custom crates which are at 0.3.0).
fork-upstream-map.toml: bootloader back from PENDING_REBASE to 1.0.0
since the partial rebase matches upstream 1.0.0 content.
fork-upstream-map.toml: base restored to 'main' tracked (was correctly
tracked by build-redbear.sh).
92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/* Lock a mutex, abandoning after a certain time.
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Copyright (C) 2019-2025 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <pthread.h>
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#include <errno.h>
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#include <limits.h>
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#include <sys/time.h>
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#include <time.h>
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#ifndef MIN
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# define MIN(a, b) ((a) < (b) ? (a) : (b))
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#endif
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int
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pthread_mutex_timedlock (pthread_mutex_t *mutex, const struct timespec *abstime)
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{
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/* Poll the mutex's state in regular intervals. Ugh. */
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/* POSIX says:
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"Under no circumstance shall the function fail with a timeout if
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the mutex can be locked immediately. The validity of the abstime
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parameter need not be checked if the mutex can be locked
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immediately."
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Therefore start the loop with a pthread_mutex_trylock call. */
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for (;;)
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{
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int err;
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struct timeval currtime;
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unsigned long remaining;
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err = pthread_mutex_trylock (mutex);
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if (err != EBUSY)
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return err;
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gettimeofday (&currtime, NULL);
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if (currtime.tv_sec > abstime->tv_sec)
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remaining = 0;
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else
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{
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unsigned long seconds = abstime->tv_sec - currtime.tv_sec;
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remaining = seconds * 1000000000;
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if (remaining / 1000000000 != seconds) /* overflow? */
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remaining = ULONG_MAX;
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else
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{
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long nanoseconds =
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abstime->tv_nsec - currtime.tv_usec * 1000;
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if (nanoseconds >= 0)
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{
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remaining += nanoseconds;
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if (remaining < nanoseconds) /* overflow? */
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remaining = ULONG_MAX;
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}
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else
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{
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if (remaining >= - nanoseconds)
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remaining -= (- nanoseconds);
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else
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remaining = 0;
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}
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}
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}
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if (remaining == 0)
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return ETIMEDOUT;
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/* Sleep 1 ms. */
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struct timespec duration =
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{
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.tv_sec = 0,
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.tv_nsec = MIN (1000000, remaining)
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};
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nanosleep (&duration, NULL);
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}
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}
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