1 files changed, 140 insertions, 0 deletions
diff --git a/lib/libnetmap/nmctx.c b/lib/libnetmap/nmctx.c
new file mode 100644
index 000000000000..fe83b8864157
--- /dev/null
+++ b/lib/libnetmap/nmctx.c
@@ -0,0 +1,140 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (C) 2018 Universita` di Pisa
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <net/netmap_user.h>
+#define LIBNETMAP_NOTHREADSAFE
+#include "libnetmap.h"
+
+static void
+nmctx_default_error(struct nmctx *ctx, const char *errmsg)
+{
+	(void)ctx;
+	fprintf(stderr, "%s\n", errmsg);
+}
+
+static void *
+nmctx_default_malloc(struct nmctx *ctx, size_t sz)
+{
+	(void)ctx;
+	return malloc(sz);
+}
+
+static void
+nmctx_default_free(struct nmctx *ctx, void *p)
+{
+	(void)ctx;
+	free(p);
+}
+
+static struct nmctx nmctx_global = {
+	.verbose = 1,
+	.error = nmctx_default_error,
+	.malloc = nmctx_default_malloc,
+	.free = nmctx_default_free,
+	.lock = NULL,
+};
+
+static struct nmctx *nmctx_default = &nmctx_global;
+
+struct nmctx *
+nmctx_get(void)
+{
+	return nmctx_default;
+}
+
+struct nmctx *
+nmctx_set_default(struct nmctx *ctx)
+{
+	struct nmctx *old = nmctx_default;
+	nmctx_default = ctx;
+	return old;
+}
+
+#define MAXERRMSG 1000
+void
+nmctx_ferror(struct nmctx *ctx, const char *fmt, ...)
+{
+	char errmsg[MAXERRMSG];
+	va_list ap;
+	int rv;
+
+	if (!ctx->verbose)
+		return;
+
+	va_start(ap, fmt);
+	rv = vsnprintf(errmsg, MAXERRMSG, fmt, ap);
+	va_end(ap);
+
+	if (rv > 0) {
+		if (rv < MAXERRMSG) {
+			ctx->error(ctx, errmsg);
+		} else {
+			ctx->error(ctx, "error message too long");
+		}
+	} else {
+		ctx->error(ctx, "internal error");
+	}
+}
+
+void *
+nmctx_malloc(struct nmctx *ctx, size_t sz)
+{
+	return ctx->malloc(ctx, sz);
+}
+
+void
+nmctx_free(struct nmctx *ctx, void *p)
+{
+	ctx->free(ctx, p);
+}
+
+void
+nmctx_lock(struct nmctx *ctx)
+{
+	if (ctx->lock != NULL)
+		ctx->lock(ctx, 1);
+}
+
+void
+nmctx_unlock(struct nmctx *ctx)
+{
+	if (ctx->lock != NULL)
+		ctx->lock(ctx, 0);
+}