sessiond: Add msgpack-c 3.3.0 to the tree

[lttng-tools.git] / src / vendor / msgpack / vrefbuffer.h

diff --git a/src/vendor/msgpack/vrefbuffer.h b/src/vendor/msgpack/vrefbuffer.h
new file mode 100644 (file)
index 0000000..ab51aef
--- /dev/null
+++ b/src/vendor/msgpack/vrefbuffer.h
@@ -0,0 +1,140 @@
+/*
+ * MessagePack for C zero-copy buffer 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)
+ */
+#ifndef MSGPACK_VREFBUFFER_H
+#define MSGPACK_VREFBUFFER_H
+
+#include "zone.h"
+#include <stdlib.h>
+
+#if defined(unix) || defined(__unix) || defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__QNX__) || defined(__QNXTO__) || defined(__HAIKU__)
+#include <sys/uio.h>
+#else
+struct iovec {
+    void  *iov_base;
+    size_t iov_len;
+};
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/**
+ * @defgroup msgpack_vrefbuffer Vectored Referencing buffer
+ * @ingroup msgpack_buffer
+ * @{
+ */
+
+struct msgpack_vrefbuffer_chunk;
+typedef struct msgpack_vrefbuffer_chunk msgpack_vrefbuffer_chunk;
+
+typedef struct msgpack_vrefbuffer_inner_buffer {
+    size_t free;
+    char*  ptr;
+    msgpack_vrefbuffer_chunk* head;
+} msgpack_vrefbuffer_inner_buffer;
+
+typedef struct msgpack_vrefbuffer {
+    struct iovec* tail;
+    struct iovec* end;
+    struct iovec* array;
+
+    size_t chunk_size;
+    size_t ref_size;
+
+    msgpack_vrefbuffer_inner_buffer inner_buffer;
+} msgpack_vrefbuffer;
+
+
+#ifndef MSGPACK_VREFBUFFER_REF_SIZE
+#define MSGPACK_VREFBUFFER_REF_SIZE 32
+#endif
+
+#ifndef MSGPACK_VREFBUFFER_CHUNK_SIZE
+#define MSGPACK_VREFBUFFER_CHUNK_SIZE 8192
+#endif
+
+MSGPACK_DLLEXPORT
+bool msgpack_vrefbuffer_init(msgpack_vrefbuffer* vbuf,
+        size_t ref_size, size_t chunk_size);
+MSGPACK_DLLEXPORT
+void msgpack_vrefbuffer_destroy(msgpack_vrefbuffer* vbuf);
+
+static inline msgpack_vrefbuffer* msgpack_vrefbuffer_new(size_t ref_size, size_t chunk_size);
+static inline void msgpack_vrefbuffer_free(msgpack_vrefbuffer* vbuf);
+
+static inline int msgpack_vrefbuffer_write(void* data, const char* buf, size_t len);
+
+static inline const struct iovec* msgpack_vrefbuffer_vec(const msgpack_vrefbuffer* vref);
+static inline size_t msgpack_vrefbuffer_veclen(const msgpack_vrefbuffer* vref);
+
+MSGPACK_DLLEXPORT
+int msgpack_vrefbuffer_append_copy(msgpack_vrefbuffer* vbuf,
+        const char* buf, size_t len);
+
+MSGPACK_DLLEXPORT
+int msgpack_vrefbuffer_append_ref(msgpack_vrefbuffer* vbuf,
+        const char* buf, size_t len);
+
+MSGPACK_DLLEXPORT
+int msgpack_vrefbuffer_migrate(msgpack_vrefbuffer* vbuf, msgpack_vrefbuffer* to);
+
+MSGPACK_DLLEXPORT
+void msgpack_vrefbuffer_clear(msgpack_vrefbuffer* vref);
+
+/** @} */
+
+
+static inline msgpack_vrefbuffer* msgpack_vrefbuffer_new(size_t ref_size, size_t chunk_size)
+{
+    msgpack_vrefbuffer* vbuf = (msgpack_vrefbuffer*)malloc(sizeof(msgpack_vrefbuffer));
+    if (vbuf == NULL) return NULL;
+    if(!msgpack_vrefbuffer_init(vbuf, ref_size, chunk_size)) {
+        free(vbuf);
+        return NULL;
+    }
+    return vbuf;
+}
+
+static inline void msgpack_vrefbuffer_free(msgpack_vrefbuffer* vbuf)
+{
+    if(vbuf == NULL) { return; }
+    msgpack_vrefbuffer_destroy(vbuf);
+    free(vbuf);
+}
+
+static inline int msgpack_vrefbuffer_write(void* data, const char* buf, size_t len)
+{
+    msgpack_vrefbuffer* vbuf = (msgpack_vrefbuffer*)data;
+
+    if(len < vbuf->ref_size) {
+        return msgpack_vrefbuffer_append_copy(vbuf, buf, len);
+    } else {
+        return msgpack_vrefbuffer_append_ref(vbuf, buf, len);
+    }
+}
+
+static inline const struct iovec* msgpack_vrefbuffer_vec(const msgpack_vrefbuffer* vref)
+{
+    return vref->array;
+}
+
+static inline size_t msgpack_vrefbuffer_veclen(const msgpack_vrefbuffer* vref)
+{
+    return (size_t)(vref->tail - vref->array);
+}
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* msgpack/vrefbuffer.h */