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authorWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:04:02 -0600
committerWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:04:02 -0600
commite1e46622ac0fce73d802fa4a8a2e83cc25cd9e7a (patch)
tree2c8d14e4dcc733f4227f0984ed05da5826b13acd /libpthread/linuxthreads/specific.c
parent6b6ede3d15f04fe825cfa9f697507457e3640344 (diff)
Revert "resolve merge"
This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344.
Diffstat (limited to 'libpthread/linuxthreads/specific.c')
-rw-r--r--libpthread/linuxthreads/specific.c223
1 files changed, 134 insertions, 89 deletions
diff --git a/libpthread/linuxthreads/specific.c b/libpthread/linuxthreads/specific.c
index c4bcfbf8c..0daad83f5 100644
--- a/libpthread/linuxthreads/specific.c
+++ b/libpthread/linuxthreads/specific.c
@@ -14,7 +14,6 @@
/* Thread-specific data */
-#include <features.h>
#include <errno.h>
#include <stddef.h>
#include <stdlib.h>
@@ -22,6 +21,8 @@
#include "internals.h"
#include "spinlock.h"
#include "restart.h"
+#include <bits/libc-lock.h>
+#include <not-cancel.h>
/* Table of keys. */
@@ -38,133 +39,177 @@ static pthread_mutex_t pthread_keys_mutex = PTHREAD_MUTEX_INITIALIZER;
/* Create a new key */
-int pthread_key_create(pthread_key_t * key, destr_function destr)
+int __pthread_key_create(pthread_key_t * key, destr_function destr)
{
int i;
- __pthread_mutex_lock(&pthread_keys_mutex);
+ pthread_mutex_lock(&pthread_keys_mutex);
for (i = 0; i < PTHREAD_KEYS_MAX; i++) {
if (! pthread_keys[i].in_use) {
/* Mark key in use */
pthread_keys[i].in_use = 1;
pthread_keys[i].destr = destr;
- __pthread_mutex_unlock(&pthread_keys_mutex);
+ pthread_mutex_unlock(&pthread_keys_mutex);
*key = i;
return 0;
}
}
- __pthread_mutex_unlock(&pthread_keys_mutex);
+ pthread_mutex_unlock(&pthread_keys_mutex);
return EAGAIN;
}
+strong_alias (__pthread_key_create, pthread_key_create)
+
+/* Reset deleted key's value to NULL in each live thread.
+ * NOTE: this executes in the context of the thread manager! */
+
+struct pthread_key_delete_helper_args {
+ /* Damn, we need lexical closures in C! ;) */
+ unsigned int idx1st, idx2nd;
+ pthread_descr self;
+};
+
+static void pthread_key_delete_helper(void *arg, pthread_descr th)
+{
+ struct pthread_key_delete_helper_args *args = arg;
+ unsigned int idx1st = args->idx1st;
+ unsigned int idx2nd = args->idx2nd;
+ pthread_descr self = args->self;
+
+ if (self == 0)
+ self = args->self = thread_self();
+
+ if (!th->p_terminated) {
+ /* pthread_exit() may try to free th->p_specific[idx1st] concurrently. */
+ __pthread_lock(th->p_lock, self);
+ if (th->p_specific[idx1st] != NULL)
+ th->p_specific[idx1st][idx2nd] = NULL;
+ __pthread_unlock(th->p_lock);
+ }
+}
/* Delete a key */
int pthread_key_delete(pthread_key_t key)
{
- pthread_descr self = thread_self();
+ pthread_descr self = thread_self();
+
+ pthread_mutex_lock(&pthread_keys_mutex);
+ if (key >= PTHREAD_KEYS_MAX || !pthread_keys[key].in_use) {
+ pthread_mutex_unlock(&pthread_keys_mutex);
+ return EINVAL;
+ }
+ pthread_keys[key].in_use = 0;
+ pthread_keys[key].destr = NULL;
+
+ /* Set the value of the key to NULL in all running threads, so
+ that if the key is reallocated later by pthread_key_create, its
+ associated values will be NULL in all threads.
+
+ If no threads have been created yet, or if we are exiting, clear
+ it just in the current thread. */
+
+ struct pthread_key_delete_helper_args args;
+ args.idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
+ args.idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
+ if (__pthread_manager_request != -1
+ && !(__builtin_expect (__pthread_exit_requested, 0)))
+ {
+ struct pthread_request request;
- __pthread_mutex_lock(&pthread_keys_mutex);
- if (key >= PTHREAD_KEYS_MAX || !pthread_keys[key].in_use) {
- __pthread_mutex_unlock(&pthread_keys_mutex);
- return EINVAL;
+ args.self = 0;
+
+ request.req_thread = self;
+ request.req_kind = REQ_FOR_EACH_THREAD;
+ request.req_args.for_each.arg = &args;
+ request.req_args.for_each.fn = pthread_key_delete_helper;
+
+ TEMP_FAILURE_RETRY(write_not_cancel(__pthread_manager_request,
+ (char *) &request, sizeof(request)));
+ suspend(self);
}
- pthread_keys[key].in_use = 0;
- pthread_keys[key].destr = NULL;
-
- /* Set the value of the key to NULL in all running threads, so
- that if the key is reallocated later by pthread_key_create, its
- associated values will be NULL in all threads.
- Do nothing if no threads have been created yet. */
- if (__pthread_manager_request != -1)
+ else
{
- pthread_descr th;
- unsigned int idx1st, idx2nd;
-
- idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
- idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
- th = self;
- do {
- /* If the thread already is terminated don't modify the memory. */
- if (!th->p_terminated && th->p_specific[idx1st] != NULL)
- th->p_specific[idx1st][idx2nd] = NULL;
- th = th->p_nextlive;
- } while (th != self);
+ if (self->p_specific[args.idx1st] != NULL)
+ self->p_specific[args.idx1st][args.idx2nd] = NULL;
}
- __pthread_mutex_unlock(&pthread_keys_mutex);
- return 0;
+ pthread_mutex_unlock(&pthread_keys_mutex);
+ return 0;
}
/* Set the value of a key */
-int pthread_setspecific(pthread_key_t key, const void * pointer)
+int __pthread_setspecific(pthread_key_t key, const void * pointer)
{
- pthread_descr self = thread_self();
- unsigned int idx1st, idx2nd;
-
- if (key >= PTHREAD_KEYS_MAX || !pthread_keys[key].in_use)
- return EINVAL;
- idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
- idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
- if (THREAD_GETMEM_NC(self, p_specific[idx1st]) == NULL) {
- void *newp = calloc(PTHREAD_KEY_2NDLEVEL_SIZE, sizeof (void *));
- if (newp == NULL)
- return ENOMEM;
- THREAD_SETMEM_NC(self, p_specific[idx1st], newp);
- }
- THREAD_GETMEM_NC(self, p_specific[idx1st])[idx2nd] = (void *) pointer;
- return 0;
+ pthread_descr self = thread_self();
+ unsigned int idx1st, idx2nd;
+
+ if (key >= PTHREAD_KEYS_MAX || !pthread_keys[key].in_use)
+ return EINVAL;
+ idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
+ idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
+ if (THREAD_GETMEM_NC(self, p_specific[idx1st]) == NULL) {
+ void *newp = calloc(PTHREAD_KEY_2NDLEVEL_SIZE, sizeof (void *));
+ if (newp == NULL)
+ return ENOMEM;
+ THREAD_SETMEM_NC(self, p_specific[idx1st], newp);
+ }
+ THREAD_GETMEM_NC(self, p_specific[idx1st])[idx2nd] = (void *) pointer;
+ return 0;
}
+strong_alias (__pthread_setspecific, pthread_setspecific)
/* Get the value of a key */
-void * pthread_getspecific(pthread_key_t key)
+void * __pthread_getspecific(pthread_key_t key)
{
- pthread_descr self = thread_self();
- unsigned int idx1st, idx2nd;
-
- if (key >= PTHREAD_KEYS_MAX)
- return NULL;
- idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
- idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
- if (THREAD_GETMEM_NC(self, p_specific[idx1st]) == NULL
- || !pthread_keys[key].in_use)
- return NULL;
- return THREAD_GETMEM_NC(self, p_specific[idx1st])[idx2nd];
+ pthread_descr self = thread_self();
+ unsigned int idx1st, idx2nd;
+
+ if (key >= PTHREAD_KEYS_MAX)
+ return NULL;
+ idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
+ idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
+ if (THREAD_GETMEM_NC(self, p_specific[idx1st]) == NULL
+ || !pthread_keys[key].in_use)
+ return NULL;
+ return THREAD_GETMEM_NC(self, p_specific[idx1st])[idx2nd];
}
+strong_alias (__pthread_getspecific, pthread_getspecific)
/* Call the destruction routines on all keys */
-void __pthread_destroy_specifics(void)
+void __pthread_destroy_specifics()
{
- pthread_descr self = thread_self();
- int i, j, round, found_nonzero;
- destr_function destr;
- void * data;
-
- for (round = 0, found_nonzero = 1;
- found_nonzero && round < PTHREAD_DESTRUCTOR_ITERATIONS;
- round++) {
- found_nonzero = 0;
- for (i = 0; i < PTHREAD_KEY_1STLEVEL_SIZE; i++)
- if (THREAD_GETMEM_NC(self, p_specific[i]) != NULL)
- for (j = 0; j < PTHREAD_KEY_2NDLEVEL_SIZE; j++) {
- destr = pthread_keys[i * PTHREAD_KEY_2NDLEVEL_SIZE + j].destr;
- data = THREAD_GETMEM_NC(self, p_specific[i])[j];
- if (destr != NULL && data != NULL) {
- THREAD_GETMEM_NC(self, p_specific[i])[j] = NULL;
- destr(data);
- found_nonzero = 1;
- }
- }
- }
- __pthread_lock(THREAD_GETMEM(self, p_lock), self);
- for (i = 0; i < PTHREAD_KEY_1STLEVEL_SIZE; i++) {
- if (THREAD_GETMEM_NC(self, p_specific[i]) != NULL) {
- free(THREAD_GETMEM_NC(self, p_specific[i]));
- THREAD_SETMEM_NC(self, p_specific[i], NULL);
- }
+ pthread_descr self = thread_self();
+ int i, j, round, found_nonzero;
+ destr_function destr;
+ void * data;
+
+ for (round = 0, found_nonzero = 1;
+ found_nonzero && round < PTHREAD_DESTRUCTOR_ITERATIONS;
+ round++) {
+ found_nonzero = 0;
+ for (i = 0; i < PTHREAD_KEY_1STLEVEL_SIZE; i++)
+ if (THREAD_GETMEM_NC(self, p_specific[i]) != NULL)
+ for (j = 0; j < PTHREAD_KEY_2NDLEVEL_SIZE; j++) {
+ destr = pthread_keys[i * PTHREAD_KEY_2NDLEVEL_SIZE + j].destr;
+ data = THREAD_GETMEM_NC(self, p_specific[i])[j];
+ if (destr != NULL && data != NULL) {
+ THREAD_GETMEM_NC(self, p_specific[i])[j] = NULL;
+ destr(data);
+ found_nonzero = 1;
+ }
+ }
+ }
+ __pthread_lock(THREAD_GETMEM(self, p_lock), self);
+ for (i = 0; i < PTHREAD_KEY_1STLEVEL_SIZE; i++) {
+ if (THREAD_GETMEM_NC(self, p_specific[i]) != NULL) {
+ void *p = THREAD_GETMEM_NC(self, p_specific[i]);
+ THREAD_SETMEM_NC(self, p_specific[i], NULL);
+ free(p);
}
- __pthread_unlock(THREAD_GETMEM(self, p_lock));
+ }
+ __pthread_unlock(THREAD_GETMEM(self, p_lock));
}
#if !defined __UCLIBC_HAS_TLS__ && defined __UCLIBC_HAS_RPC__