1 files changed, 111 insertions, 0 deletions

diff --git a/lib/libnetmap/nmctx.c b/lib/libnetmap/nmctx.c
new file mode 100644
index 000000000000..244c0349670b
--- /dev/null
+++ b/lib/libnetmap/nmctx.c
@@ -0,0 +1,111 @@
+/* $FreeBSD$ */
+#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)
+{
+	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);
+}