From f4603994a39431c8cee036216a6d15ab7281b0c6 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Mon, 14 Dec 2015 01:58:21 -0500
Subject: initial commit.

---
 src/driver/sfrt_unit_ctx.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 src/driver/sfrt_unit_ctx.c

(limited to 'src/driver/sfrt_unit_ctx.c')

diff --git a/src/driver/sfrt_unit_ctx.c b/src/driver/sfrt_unit_ctx.c
new file mode 100644
index 0000000..cef9913
--- /dev/null
+++ b/src/driver/sfrt_unit_ctx.c
@@ -0,0 +1,56 @@
+#include <stdint.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+
+#include <sofort/sofort.h>
+#include "sofort_driver_impl.h"
+
+static int sfrt_free_unit_ctx_impl(struct sfrt_unit_ctx_impl * ctx, int status)
+{
+	if (ctx) {
+		sfrt_unmap_input(&ctx->map);
+		free(ctx);
+	}
+
+	return status;
+}
+
+int sfrt_get_unit_ctx(
+	const struct sfrt_driver_ctx *	dctx,
+	const char *			path,
+	struct sfrt_unit_ctx **		pctx)
+{
+	struct sfrt_unit_ctx_impl *	ctx;
+
+	if (!dctx || !(ctx = calloc(sizeof(*ctx),1)))
+		return -1;
+
+	if (sfrt_map_input(-1,path,PROT_READ,&ctx->map))
+		return sfrt_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 sfrt_free_unit_ctx(struct sfrt_unit_ctx * ctx)
+{
+	struct sfrt_unit_ctx_impl *	ictx;
+	uintptr_t			addr;
+
+	if (ctx) {
+		addr = (uintptr_t)ctx - offsetof(struct sfrt_unit_ctx_impl,uctx);
+		ictx = (struct sfrt_unit_ctx_impl *)addr;
+		sfrt_free_unit_ctx_impl(ictx,0);
+	}
+}
-- 
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