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diff --git a/ioreplay/src/generate/gtask.h b/ioreplay/src/generate/gtask.h
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+// Copyright 2018 Mimecast Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef GTASK_H
+#define GTASK_H
+
+#include "vsize.h"
+
+#include "gprocess.h"
+#include "../vfd.h"
+#include "../datas/amap.h"
+#include "../datas/hmap.h"
+#include "../datas/rbuffer.h"
+#include "../defaults.h"
+#include "../mounts.h"
+#include "../options.h"
+
+/**
+ * @brief The generate task definition
+ *
+ * The gtask holds all possible variables required to process a particular
+ * .capture line and to generate the corresponding .replay line
+ */
+typedef struct gtask_s_ {
+    bool has_fd; /**<  True if task has a file descriptor number */
+    char *line; /**< A pointer to the remaining part of the .capture line */
+    char *op; /**< Operation/syscall name */
+    char *path2; /**< A second path name (e.g. for rename) */
+    char *path2_r; /**< Work around to track mallocs, so it can be freed */
+    char *path; /**< Path name */
+    char *path_r; /**< Work around to track mallocs, so it can be freed */
+    char *pidtid; /**< String representing pid:tid */
+    int F; /**< Arguments for fcntl syscall */
+    int G; /**< Arguments for fcntl syscall */
+    int fd; /**< File descriptor number */
+    int flags; /**< File open flags */
+    int mode; /**< File open mode */
+    int ret; /**< ioreplay process status, SUCCESS if everything is alright */
+    int status; /**< Operation/syscall return status */
+    long address2; /**< Another address (used by mmap related syscalls) */
+    long address; /**< An address (used by mmap related syscalls) */
+    long bytes; /**< Amount of bytes */
+    long count; /**< A count */
+    long lineno; /**<  The current line number */
+    long mapped_fd; /**< The mapped file descriptor number */
+    long mapped_time; /**< The mapped time */
+    long offset; /**< A offset */
+    long pid; /**< The process ID */
+    long tid; /**< The thread ID */
+    long whence; /**< Whence */
+    vfd_s *vfd; /**< A pointer to the virtual file descriptor */
+    struct gprocess_s_ *gprocess; /**< A pointer to the process object */
+    void *generate; /**< A pointer to the generate object */
+    vsize_s *vsize2; /**< Pointer to a second virtual size object */
+    vsize_s *vsize; /**< Pointer to the virtual size object */
+#ifdef LOG_FILTERED
+    char *original_line; /**< Only used for debugging purposes */
+    char *filtered_where; /**< Only used for debugging purposes  */
+#endif
+} gtask_s;
+
+/**
+ * @brief Creates a new task object
+ *
+ * @param generate A pointer to the generate object
+ * @return The new task object
+ */
+gtask_s* gtask_new(void *generate);
+
+/**
+ * @brief Initialises a taks object
+ *
+ * This function is used in particular when we recycle/reuse an old
+ * gtask object.
+ *
+ * @param t The gtask object
+ * @param line The corresponding line from the .capture file
+ * @param lineno The line number
+ */
+void gtask_init(gtask_s *t, char *line, const unsigned long lineno);
+
+/**
+ * @brief Destroys a given task object
+ *
+ * @param t The task object
+ */
+void gtask_destroy(gtask_s *t);
+
+#endif // GTASK_H