X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=boehm-gc%2Fspecific.c;fp=boehm-gc%2Fspecific.c;h=0000000000000000000000000000000000000000;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=2c40c2b44a2623996d0a0fbfe34607e4bafb585e;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git

diff --git a/boehm-gc/specific.c b/boehm-gc/specific.c
deleted file mode 100644
index 2c40c2b4..00000000
--- a/boehm-gc/specific.c
+++ /dev/null
@@ -1,127 +0,0 @@
-/* 
- * Copyright (c) 2000 by Hewlett-Packard Company.  All rights reserved.
- *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
- *
- * Permission is hereby granted to use or copy this program
- * for any purpose,  provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
- */
-
-#if defined(GC_LINUX_THREADS)
-
-#include "private/gc_priv.h" /* For GC_compare_and_exchange, GC_memory_barrier */
-#include "private/specific.h"
-
-static tse invalid_tse = {INVALID_QTID, 0, 0, INVALID_THREADID};
-			/* A thread-specific data entry which will never	*/
-			/* appear valid to a reader.  Used to fill in empty	*/
-			/* cache entries to avoid a check for 0.		*/
-
-int PREFIXED(key_create) (tsd ** key_ptr, void (* destructor)(void *)) {
-    int i;
-    tsd * result = (tsd *)MALLOC_CLEAR(sizeof (tsd));
-
-    /* A quick alignment check, since we need atomic stores */
-      GC_ASSERT((unsigned long)(&invalid_tse.next) % sizeof(tse *) == 0);
-    if (0 == result) return ENOMEM;
-    pthread_mutex_init(&(result -> lock), NULL);
-    for (i = 0; i < TS_CACHE_SIZE; ++i) {
-	result -> cache[i] = &invalid_tse;
-    }
-#   ifdef GC_ASSERTIONS
-      for (i = 0; i < TS_HASH_SIZE; ++i) {
-	GC_ASSERT(result -> hash[i] == 0);
-      }
-#   endif
-    *key_ptr = result;
-    return 0;
-}
-
-int PREFIXED(setspecific) (tsd * key, void * value) {
-    pthread_t self = pthread_self();
-    int hash_val = HASH(self);
-    volatile tse * entry = (volatile tse *)MALLOC_CLEAR(sizeof (tse));
-    
-    GC_ASSERT(self != INVALID_THREADID);
-    if (0 == entry) return ENOMEM;
-    pthread_mutex_lock(&(key -> lock));
-    /* Could easily check for an existing entry here.	*/
-    entry -> next = key -> hash[hash_val];
-    entry -> thread = self;
-    entry -> value = value;
-    GC_ASSERT(entry -> qtid == INVALID_QTID);
-    /* There can only be one writer at a time, but this needs to be	*/
-    /* atomic with respect to concurrent readers.			*/ 
-    *(volatile tse **)(key -> hash + hash_val) = entry;
-    pthread_mutex_unlock(&(key -> lock));
-    return 0;
-}
-
-/* Remove thread-specific data for this thread.  Should be called on	*/
-/* thread exit.								*/
-void PREFIXED(remove_specific) (tsd * key) {
-    pthread_t self = pthread_self();
-    unsigned hash_val = HASH(self);
-    tse *entry;
-    tse **link = key -> hash + hash_val;
-
-    pthread_mutex_lock(&(key -> lock));
-    entry = *link;
-    while (entry != NULL && entry -> thread != self) {
-	link = &(entry -> next);
-        entry = *link;
-    }
-    /* Invalidate qtid field, since qtids may be reused, and a later 	*/
-    /* cache lookup could otherwise find this entry.			*/
-        entry -> qtid = INVALID_QTID;
-    if (entry != NULL) {
-	*link = entry -> next;
-	/* Atomic! concurrent accesses still work.	*/
-	/* They must, since readers don't lock.		*/
-	/* We shouldn't need a volatile access here,	*/
-	/* since both this and the preceding write 	*/
-	/* should become visible no later than		*/
-	/* the pthread_mutex_unlock() call.		*/
-    }
-    /* If we wanted to deallocate the entry, we'd first have to clear 	*/
-    /* any cache entries pointing to it.  That probably requires	*/
-    /* additional synchronization, since we can't prevent a concurrent 	*/
-    /* cache lookup, which should still be examining deallocated memory.*/
-    /* This can only happen if the concurrent access is from another	*/
-    /* thread, and hence has missed the cache, but still...		*/
-
-    /* With GC, we're done, since the pointers from the cache will 	*/
-    /* be overwritten, all local pointers to the entries will be	*/
-    /* dropped, and the entry will then be reclaimed.			*/
-    pthread_mutex_unlock(&(key -> lock));
-}
-
-/* Note that even the slow path doesn't lock.	*/
-void *  PREFIXED(slow_getspecific) (tsd * key, unsigned long qtid,
-				    tse * volatile * cache_ptr) {
-    pthread_t self = pthread_self();
-    unsigned hash_val = HASH(self);
-    tse *entry = key -> hash[hash_val];
-
-    GC_ASSERT(qtid != INVALID_QTID);
-    while (entry != NULL && entry -> thread != self) {
-	entry = entry -> next;
-    } 
-    if (entry == NULL) return NULL;
-    /* Set cache_entry.		*/
-        entry -> qtid = qtid;
-		/* It's safe to do this asynchronously.  Either value 	*/
-		/* is safe, though may produce spurious misses.		*/
-		/* We're replacing one qtid with another one for the	*/
-		/* same thread.						*/
-	*cache_ptr = entry;
-		/* Again this is safe since pointer assignments are 	*/
-		/* presumed atomic, and either pointer is valid.	*/
-    return entry -> value;
-}
-
-#endif /* GC_LINUX_THREADS */