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nptl: Move the internal thread priority protection symbols into libc

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This is a prerequisite for moving the mutex implementation.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer 2021-04-21 19:49:51 +02:00
parent eb29dcde31
commit 798cacde76
4 changed files with 21 additions and 8 deletions
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2
nptl/Makefile
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@ -94,6 +94,7 @@ routines = \
pthread_setschedparam \
pthread_setspecific \
pthread_sigmask \
tpp \
unwind \
shared-only-routines = forward
@ -214,7 +215,6 @@ libpthread-routines = \
sem_timedwait \
sem_unlink \
sem_wait \
tpp \
vars \
version \

5
nptl/Versions
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@ -120,6 +120,7 @@ libc {
GLIBC_PRIVATE {
__futex_abstimed_wait64;
__futex_abstimed_wait_cancelable64;
__init_sched_fifo_prio;
__libc_alloca_cutoff;
__libc_cleanup_pop_restore;
__libc_cleanup_push_defer;
@ -143,13 +144,17 @@ libc {
__pthread_cleanup_upto;
__pthread_cond_destroy; # Used by the C11 threads.
__pthread_cond_init; # Used by the C11 threads.
__pthread_current_priority;
__pthread_exit;
__pthread_force_elision;
__pthread_getattr_default_np;
__pthread_key_delete;
__pthread_keys;
__pthread_setcancelstate;
__pthread_tpp_change_priority;
__pthread_unwind;
__sched_fifo_max_prio;
__sched_fifo_min_prio;
}
}

16
nptl/pthreadP.h
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@ -231,12 +231,16 @@ rtld_hidden_proto (__nptl_set_robust_list_avail)
#endif
/* Thread Priority Protection. */
extern int __sched_fifo_min_prio attribute_hidden;
extern int __sched_fifo_max_prio attribute_hidden;
extern void __init_sched_fifo_prio (void) attribute_hidden;
extern int __pthread_tpp_change_priority (int prev_prio, int new_prio)
attribute_hidden;
extern int __pthread_current_priority (void) attribute_hidden;
extern int __sched_fifo_min_prio;
libc_hidden_proto (__sched_fifo_min_prio)
extern int __sched_fifo_max_prio;
libc_hidden_proto (__sched_fifo_max_prio)
extern void __init_sched_fifo_prio (void);
libc_hidden_proto (__init_sched_fifo_prio)
extern int __pthread_tpp_change_priority (int prev_prio, int new_prio);
libc_hidden_proto (__pthread_tpp_change_priority)
extern int __pthread_current_priority (void);
libc_hidden_proto (__pthread_current_priority)
/* The library can run in debugging mode where it performs a lot more
tests. */

6
nptl/tpp.c
View File

@ -25,9 +25,10 @@
#include <stdlib.h>
#include <atomic.h>
int __sched_fifo_min_prio = -1;
libc_hidden_data_def (__sched_fifo_min_prio)
int __sched_fifo_max_prio = -1;
libc_hidden_data_def (__sched_fifo_max_prio)
/* We only want to initialize __sched_fifo_min_prio and __sched_fifo_max_prio
once. The standard solution would be similar to pthread_once, but then
@ -47,6 +48,7 @@ __init_sched_fifo_prio (void)
atomic_store_relaxed (&__sched_fifo_min_prio,
__sched_get_priority_min (SCHED_FIFO));
}
libc_hidden_def (__init_sched_fifo_prio)
int
__pthread_tpp_change_priority (int previous_prio, int new_prio)
@ -155,6 +157,7 @@ __pthread_tpp_change_priority (int previous_prio, int new_prio)
return result;
}
libc_hidden_def (__pthread_tpp_change_priority)
int
__pthread_current_priority (void)
@ -193,3 +196,4 @@ __pthread_current_priority (void)
return result;
}
libc_hidden_def (__pthread_current_priority)