created skeleton.

1 files changed, 62 insertions, 0 deletions

diff --git a/src/driver/mdso_unit_ctx.c b/src/driver/mdso_unit_ctx.c
new file mode 100644
index 0000000..870e060
--- /dev/null
+++ b/src/driver/mdso_unit_ctx.c
@@ -0,0 +1,62 @@
+/****************************************************************/
+/*  mdso: midipix dso scavenger                                 */
+/*  Copyright (C) 2015  Z. Gilboa                               */
+/*  Released under GPLv2 and GPLv3; see COPYING.MDSO.           */
+/****************************************************************/
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+
+#include <mdso/mdso.h>
+#include "mdso_driver_impl.h"
+
+static int mdso_free_unit_ctx_impl(struct mdso_unit_ctx_impl * ctx, int status)
+{
+	if (ctx) {
+		mdso_unmap_input(&ctx->map);
+		free(ctx);
+	}
+
+	return status;
+}
+
+int mdso_get_unit_ctx(
+	const struct mdso_driver_ctx *	dctx,
+	const char *			path,
+	struct mdso_unit_ctx **		pctx)
+{
+	struct mdso_unit_ctx_impl *	ctx;
+
+	if (!dctx || !(ctx = calloc(sizeof(*ctx),1)))
+		return -1;
+
+	if (mdso_map_input(-1,path,PROT_READ,&ctx->map))
+		return mdso_free_unit_ctx_impl(ctx,-1);
+
+	memcpy(&ctx->cctx,dctx->cctx,
+		sizeof(ctx->cctx));
+
+	ctx->path	= path;
+
+	ctx->uctx.path	= &ctx->path;
+	ctx->uctx.map	= &ctx->map;
+	ctx->uctx.cctx	= &ctx->cctx;
+
+	*pctx = &ctx->uctx;
+	return 0;
+}
+
+void mdso_free_unit_ctx(struct mdso_unit_ctx * ctx)
+{
+	struct mdso_unit_ctx_impl *	ictx;
+	uintptr_t			addr;
+
+	if (ctx) {
+		addr = (uintptr_t)ctx - offsetof(struct mdso_unit_ctx_impl,uctx);
+		ictx = (struct mdso_unit_ctx_impl *)addr;
+		mdso_free_unit_ctx_impl(ictx,0);
+	}
+}