X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fvendor%2Fmsgpack%2Fzone.c;fp=src%2Fvendor%2Fmsgpack%2Fzone.c;h=d63b9d63d5983714763537a2e50860f2fbc594f9;hp=0000000000000000000000000000000000000000;hb=116a02e33a6aba03128c268c333e1c35584848d2;hpb=267d66aaabfe8f520be83749fe75505ddf2d086f

diff --git a/src/vendor/msgpack/zone.c b/src/vendor/msgpack/zone.c
new file mode 100644
index 000000000..d63b9d63d
--- /dev/null
+++ b/src/vendor/msgpack/zone.c
@@ -0,0 +1,222 @@
+/*
+ * MessagePack for C memory pool implementation
+ *
+ * Copyright (C) 2008-2009 FURUHASHI Sadayuki
+ *
+ *    Distributed under the Boost Software License, Version 1.0.
+ *    (See accompanying file LICENSE_1_0.txt or copy at
+ *    http://www.boost.org/LICENSE_1_0.txt)
+ */
+#include "vendor/msgpack/zone.h"
+#include <stdlib.h>
+#include <string.h>
+
+struct msgpack_zone_chunk {
+    struct msgpack_zone_chunk* next;
+    /* data ... */
+};
+
+static inline bool init_chunk_list(msgpack_zone_chunk_list* cl, size_t chunk_size)
+{
+    msgpack_zone_chunk* chunk = (msgpack_zone_chunk*)malloc(
+            sizeof(msgpack_zone_chunk) + chunk_size);
+    if(chunk == NULL) {
+        return false;
+    }
+
+    cl->head = chunk;
+    cl->free = chunk_size;
+    cl->ptr  = ((char*)chunk) + sizeof(msgpack_zone_chunk);
+    chunk->next = NULL;
+
+    return true;
+}
+
+static inline void destroy_chunk_list(msgpack_zone_chunk_list* cl)
+{
+    msgpack_zone_chunk* c = cl->head;
+    while(true) {
+        msgpack_zone_chunk* n = c->next;
+        free(c);
+        if(n != NULL) {
+            c = n;
+        } else {
+            break;
+        }
+    }
+}
+
+static inline void clear_chunk_list(msgpack_zone_chunk_list* cl, size_t chunk_size)
+{
+    msgpack_zone_chunk* c = cl->head;
+    while(true) {
+        msgpack_zone_chunk* n = c->next;
+        if(n != NULL) {
+            free(c);
+            c = n;
+        } else {
+            cl->head = c;
+            break;
+        }
+    }
+    cl->head->next = NULL;
+    cl->free = chunk_size;
+    cl->ptr  = ((char*)cl->head) + sizeof(msgpack_zone_chunk);
+}
+
+void* msgpack_zone_malloc_expand(msgpack_zone* zone, size_t size)
+{
+    msgpack_zone_chunk_list* const cl = &zone->chunk_list;
+    msgpack_zone_chunk* chunk;
+
+    size_t sz = zone->chunk_size;
+
+    while(sz < size) {
+        size_t tmp_sz = sz * 2;
+        if (tmp_sz <= sz) {
+            sz = size;
+            break;
+        }
+        sz = tmp_sz;
+    }
+
+    chunk = (msgpack_zone_chunk*)malloc(
+            sizeof(msgpack_zone_chunk) + sz);
+    if (chunk == NULL) {
+        return NULL;
+    }
+    else {
+        char* ptr = ((char*)chunk) + sizeof(msgpack_zone_chunk);
+        chunk->next = cl->head;
+        cl->head = chunk;
+        cl->free = sz - size;
+        cl->ptr  = ptr + size;
+
+        return ptr;
+    }
+}
+
+
+static inline void init_finalizer_array(msgpack_zone_finalizer_array* fa)
+{
+    fa->tail  = NULL;
+    fa->end   = NULL;
+    fa->array = NULL;
+}
+
+static inline void call_finalizer_array(msgpack_zone_finalizer_array* fa)
+{
+    msgpack_zone_finalizer* fin = fa->tail;
+    for(; fin != fa->array; --fin) {
+        (*(fin-1)->func)((fin-1)->data);
+    }
+}
+
+static inline void destroy_finalizer_array(msgpack_zone_finalizer_array* fa)
+{
+    call_finalizer_array(fa);
+    free(fa->array);
+}
+
+static inline void clear_finalizer_array(msgpack_zone_finalizer_array* fa)
+{
+    call_finalizer_array(fa);
+    fa->tail = fa->array;
+}
+
+bool msgpack_zone_push_finalizer_expand(msgpack_zone* zone,
+        void (*func)(void* data), void* data)
+{
+    msgpack_zone_finalizer_array* const fa = &zone->finalizer_array;
+    msgpack_zone_finalizer* tmp;
+
+    const size_t nused = (size_t)(fa->end - fa->array);
+
+    size_t nnext;
+    if(nused == 0) {
+        nnext = (sizeof(msgpack_zone_finalizer) < 72/2) ?
+                72 / sizeof(msgpack_zone_finalizer) : 8;
+
+    } else {
+        nnext = nused * 2;
+    }
+
+    tmp = (msgpack_zone_finalizer*)realloc(fa->array,
+                sizeof(msgpack_zone_finalizer) * nnext);
+    if(tmp == NULL) {
+        return false;
+    }
+
+    fa->array  = tmp;
+    fa->end    = tmp + nnext;
+    fa->tail   = tmp + nused;
+
+    fa->tail->func = func;
+    fa->tail->data = data;
+
+    ++fa->tail;
+
+    return true;
+}
+
+
+bool msgpack_zone_is_empty(msgpack_zone* zone)
+{
+    msgpack_zone_chunk_list* const cl = &zone->chunk_list;
+    msgpack_zone_finalizer_array* const fa = &zone->finalizer_array;
+    return cl->free == zone->chunk_size && cl->head->next == NULL &&
+        fa->tail == fa->array;
+}
+
+
+void msgpack_zone_destroy(msgpack_zone* zone)
+{
+    destroy_finalizer_array(&zone->finalizer_array);
+    destroy_chunk_list(&zone->chunk_list);
+}
+
+void msgpack_zone_clear(msgpack_zone* zone)
+{
+    clear_finalizer_array(&zone->finalizer_array);
+    clear_chunk_list(&zone->chunk_list, zone->chunk_size);
+}
+
+bool msgpack_zone_init(msgpack_zone* zone, size_t chunk_size)
+{
+    zone->chunk_size = chunk_size;
+
+    if(!init_chunk_list(&zone->chunk_list, chunk_size)) {
+        return false;
+    }
+
+    init_finalizer_array(&zone->finalizer_array);
+
+    return true;
+}
+
+msgpack_zone* msgpack_zone_new(size_t chunk_size)
+{
+    msgpack_zone* zone = (msgpack_zone*)malloc(
+            sizeof(msgpack_zone));
+    if(zone == NULL) {
+        return NULL;
+    }
+
+    zone->chunk_size = chunk_size;
+
+    if(!init_chunk_list(&zone->chunk_list, chunk_size)) {
+        free(zone);
+        return NULL;
+    }
+
+    init_finalizer_array(&zone->finalizer_array);
+
+    return zone;
+}
+
+void msgpack_zone_free(msgpack_zone* zone)
+{
+    if(zone == NULL) { return; }
+    msgpack_zone_destroy(zone);
+    free(zone);
+}