Adding upstream version 1:10.11.6.upstream/1%10.11.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 184 insertions, 0 deletions

diff --git a/include/lf.h b/include/lf.h
new file mode 100644
index 00000000..267a66ae
--- /dev/null
+++ b/include/lf.h
@@ -0,0 +1,184 @@
+/* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */
+
+#ifndef INCLUDE_LF_INCLUDED
+#define INCLUDE_LF_INCLUDED
+
+#include <my_atomic.h>
+
+C_MODE_START
+
+/*
+  wait-free dynamic array, see lf_dynarray.c
+
+  4 levels of 256 elements each mean 4311810304 elements in an array - it
+  should be enough for a while
+*/
+#define LF_DYNARRAY_LEVEL_LENGTH 256
+#define LF_DYNARRAY_LEVELS       4
+
+typedef struct {
+  void * volatile level[LF_DYNARRAY_LEVELS];
+  uint size_of_element;
+} LF_DYNARRAY;
+
+typedef int (*lf_dynarray_func)(void *, void *);
+
+void lf_dynarray_init(LF_DYNARRAY *array, uint element_size);
+void lf_dynarray_destroy(LF_DYNARRAY *array);
+
+void *lf_dynarray_value(LF_DYNARRAY *array, uint idx);
+void *lf_dynarray_lvalue(LF_DYNARRAY *array, uint idx);
+int lf_dynarray_iterate(LF_DYNARRAY *array, lf_dynarray_func func, void *arg);
+
+/*
+  pin manager for memory allocator, lf_alloc-pin.c
+*/
+
+#define LF_PINBOX_PINS 4
+#define LF_PURGATORY_SIZE 100
+
+typedef void lf_pinbox_free_func(void *, void *, void*);
+
+typedef struct {
+  LF_DYNARRAY pinarray;
+  lf_pinbox_free_func *free_func;
+  void *free_func_arg;
+  uint free_ptr_offset;
+  uint32 volatile pinstack_top_ver;         /* this is a versioned pointer */
+  uint32 volatile pins_in_array;            /* number of elements in array */
+} LF_PINBOX;
+
+typedef struct {
+  void * volatile pin[LF_PINBOX_PINS];
+  LF_PINBOX *pinbox;
+  void  *purgatory;
+  uint32 purgatory_count;
+  uint32 volatile link;
+  /* avoid false sharing */
+  char pad[CPU_LEVEL1_DCACHE_LINESIZE];
+} LF_PINS;
+
+/* compile-time assert to make sure we have enough pins.  */
+#define lf_pin(PINS, PIN, ADDR)                                \
+  do {                                                          \
+    compile_time_assert(PIN < LF_PINBOX_PINS);                  \
+    my_atomic_storeptr(&(PINS)->pin[PIN], (ADDR));              \
+  } while(0)
+
+#define lf_unpin(PINS, PIN)        lf_pin(PINS, PIN, NULL)
+#define lf_assert_pin(PINS, PIN)   assert((PINS)->pin[PIN] != 0)
+#define lf_assert_unpin(PINS, PIN) assert((PINS)->pin[PIN] == 0)
+
+void lf_pinbox_init(LF_PINBOX *pinbox, uint free_ptr_offset,
+                    lf_pinbox_free_func *free_func, void * free_func_arg);
+void lf_pinbox_destroy(LF_PINBOX *pinbox);
+
+LF_PINS *lf_pinbox_get_pins(LF_PINBOX *pinbox);
+void lf_pinbox_put_pins(LF_PINS *pins);
+void lf_pinbox_free(LF_PINS *pins, void *addr);
+
+/*
+  memory allocator, lf_alloc-pin.c
+*/
+
+typedef struct st_lf_allocator {
+  LF_PINBOX pinbox;
+  uchar * volatile top;
+  uint element_size;
+  uint32 volatile mallocs;
+  void (*constructor)(uchar *); /* called, when an object is malloc()'ed */
+  void (*destructor)(uchar *);  /* called, when an object is free()'d    */
+} LF_ALLOCATOR;
+
+void lf_alloc_init(LF_ALLOCATOR *allocator, uint size, uint free_ptr_offset);
+void lf_alloc_destroy(LF_ALLOCATOR *allocator);
+uint lf_alloc_pool_count(LF_ALLOCATOR *allocator);
+/*
+  shortcut macros to access underlying pinbox functions from an LF_ALLOCATOR
+  see lf_pinbox_get_pins() and lf_pinbox_put_pins()
+*/
+#define lf_alloc_free(PINS, PTR)       lf_pinbox_free((PINS), (PTR))
+#define lf_alloc_get_pins(A)           lf_pinbox_get_pins(&(A)->pinbox)
+#define lf_alloc_put_pins(PINS)        lf_pinbox_put_pins(PINS)
+#define lf_alloc_direct_free(ALLOC, ADDR) \
+  do {                                    \
+    if ((ALLOC)->destructor)              \
+      (ALLOC)->destructor((uchar*) ADDR); \
+    my_free(ADDR);                        \
+  } while(0)
+
+void *lf_alloc_new(LF_PINS *pins);
+
+C_MODE_END
+
+/*
+  extendible hash, lf_hash.cc
+*/
+#include <hash.h>
+
+C_MODE_START
+
+typedef struct st_lf_hash LF_HASH;
+typedef void (*lf_hash_initializer)(LF_HASH *hash, void *dst, const void *src);
+
+#define LF_HASH_UNIQUE 1
+
+/* lf_hash overhead per element (that is, sizeof(LF_SLIST) */
+extern const int LF_HASH_OVERHEAD;
+
+struct st_lf_hash {
+  LF_DYNARRAY array;                    /* hash itself */
+  LF_ALLOCATOR alloc;                   /* allocator for elements */
+  my_hash_get_key get_key;              /* see HASH */
+  lf_hash_initializer initializer;      /* called when an element is inserted */
+  my_hash_function hash_function;       /* see HASH */
+  CHARSET_INFO *charset;                /* see HASH */
+  uint key_offset, key_length;          /* see HASH */
+  uint element_size;                    /* size of memcpy'ed area on insert */
+  uint flags;                           /* LF_HASH_UNIQUE, etc */
+  int32 volatile size;                  /* size of array */
+  int32 volatile count;                 /* number of elements in the hash */
+};
+
+void lf_hash_init(LF_HASH *hash, uint element_size, uint flags,
+                  uint key_offset, uint key_length, my_hash_get_key get_key,
+                  CHARSET_INFO *charset);
+void lf_hash_destroy(LF_HASH *hash);
+int lf_hash_insert(LF_HASH *hash, LF_PINS *pins, const void *data);
+void *lf_hash_search(LF_HASH *hash, LF_PINS *pins, const void *key, uint keylen);
+void *lf_hash_search_using_hash_value(LF_HASH *hash, LF_PINS *pins,
+                                      my_hash_value_type hash_value,
+                                      const void *key, uint keylen);
+int lf_hash_delete(LF_HASH *hash, LF_PINS *pins, const void *key, uint keylen);
+int lf_hash_iterate(LF_HASH *hash, LF_PINS *pins,
+                    my_hash_walk_action action, void *argument);
+#define lf_hash_size(hash) \
+  my_atomic_load32_explicit(&(hash)->count, MY_MEMORY_ORDER_RELAXED)
+/*
+  shortcut macros to access underlying pinbox functions from an LF_HASH
+  see lf_pinbox_get_pins() and lf_pinbox_put_pins()
+*/
+#define lf_hash_get_pins(HASH)       lf_alloc_get_pins(&(HASH)->alloc)
+#define lf_hash_put_pins(PINS)       lf_pinbox_put_pins(PINS)
+#define lf_hash_search_unpin(PINS)   lf_unpin((PINS), 2)
+/*
+  cleanup
+*/
+
+C_MODE_END
+
+#endif
+