Test cancel from indexer progress callback

This adds tests that try canceling an indexer operation from
within the progress callback.

After writing the tests, I wanted to run this under valgrind and
had a number of errors in that situation because mmap wasn't
working.  I added a CMake option to force emulation of mmap and
consolidated the Amiga-specific code into that new place (so we
don't actually need separate Amiga code now, just have to turn on
-DNO_MMAP).

Additionally, I made the indexer code propagate error codes more
reliably than it used to.

1 files changed, 0 insertions, 48 deletions

diff --git a/src/amiga/map.c b/src/amiga/map.c
deleted file mode 100644
index 0ba7995c6..000000000
--- a/src/amiga/map.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright (C) the libgit2 contributors. All rights reserved.
- *
- * This file is part of libgit2, distributed under the GNU GPL v2 with
- * a Linking Exception. For full terms see the included COPYING file.
- */
-#include <git2/common.h>
-
-#ifndef GIT_WIN32
-
-#include "posix.h"
-#include "map.h"
-#include <errno.h>
-
-int p_mmap(git_map *out, size_t len, int prot, int flags, int fd, git_off_t offset)
-{
-	GIT_MMAP_VALIDATE(out, len, prot, flags);
-
-	out->data = NULL;
-	out->len = 0;
-
-	if ((prot & GIT_PROT_WRITE) && ((flags & GIT_MAP_TYPE) == GIT_MAP_SHARED)) {
-		giterr_set(GITERR_OS, "Trying to map shared-writeable");
-		return -1;
-	}
-
-	out->data = malloc(len);
-	GITERR_CHECK_ALLOC(out->data);
-
-	if ((p_lseek(fd, offset, SEEK_SET) < 0) || ((size_t)p_read(fd, out->data, len) != len)) {
-		giterr_set(GITERR_OS, "mmap emulation failed");
-		return -1;
-	}
-
-	out->len = len;
-	return 0;
-}
-
-int p_munmap(git_map *map)
-{
-	assert(map != NULL);
-	free(map->data);
-
-	return 0;
-}
-
-#endif
-