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authorNick Alcock <nick.alcock@oracle.com>2020-06-08 09:24:01 +0100
committerNick Alcock <nick.alcock@oracle.com>2020-07-22 17:57:49 +0100
commit2399827bfa1062c7f782499e6dcd9f988318d422 (patch)
treeea65807b4e18793968c87cc905ac034239cd4cd9
parent9850ce4d7bb89d4f9216dd5eebc88156bf31b70b (diff)
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libctf: add ctf_ref
This allows you to bump the refcount on a ctf_file_t, so that you can smuggle it out of iterators which open and close the ctf_file_t for you around the loop body (like ctf_archive_iter). You still can't use this to preserve a ctf_file_t for longer than the lifetime of its containing entity (e.g. ctf_archive). include/ * ctf-api.h (ctf_ref): New. libctf/ * libctf.ver (ctf_ref): New. * ctf-open.c (ctf_ref): Implement it.
-rw-r--r--include/ChangeLog4
-rw-r--r--include/ctf-api.h1
-rw-r--r--libctf/ChangeLog5
-rw-r--r--libctf/ctf-open.c11
-rw-r--r--libctf/libctf.ver1
5 files changed, 22 insertions, 0 deletions
diff --git a/include/ChangeLog b/include/ChangeLog
index dd9d5e0..3e3bb0a 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,5 +1,9 @@
2020-07-22 Nick Alcock <nick.alcock@oracle.com>
+ * ctf-api.h (ctf_ref): New.
+
+2020-07-22 Nick Alcock <nick.alcock@oracle.com>
+
* ctf-api.h (ctf_archive_count): New.
2020-07-22 Nick Alcock <nick.alcock@oracle.com>
diff --git a/include/ctf-api.h b/include/ctf-api.h
index fb797a3..faa7b72 100644
--- a/include/ctf-api.h
+++ b/include/ctf-api.h
@@ -285,6 +285,7 @@ extern ctf_file_t *ctf_simple_open (const char *, size_t, const char *, size_t,
size_t, const char *, size_t, int *);
extern ctf_file_t *ctf_bufopen (const ctf_sect_t *, const ctf_sect_t *,
const ctf_sect_t *, int *);
+extern void ctf_ref (ctf_file_t *);
extern void ctf_file_close (ctf_file_t *);
extern int ctf_arc_write (const char *, ctf_file_t **, size_t,
diff --git a/libctf/ChangeLog b/libctf/ChangeLog
index c22cba0..84f82fa 100644
--- a/libctf/ChangeLog
+++ b/libctf/ChangeLog
@@ -1,5 +1,10 @@
2020-07-22 Nick Alcock <nick.alcock@oracle.com>
+ * libctf.ver (ctf_ref): New.
+ * ctf-open.c (ctf_ref): Implement it.
+
+2020-07-22 Nick Alcock <nick.alcock@oracle.com>
+
* ctf-inlines.h (ctf_forwardable_kind): New.
* ctf-create.c (ctf_add_forward): Use it.
diff --git a/libctf/ctf-open.c b/libctf/ctf-open.c
index 05672f3..b7846bd 100644
--- a/libctf/ctf-open.c
+++ b/libctf/ctf-open.c
@@ -1620,6 +1620,17 @@ bad:
return NULL;
}
+/* Bump the refcount on the specified CTF container, to allow export of
+ ctf_file_t's from iterators that open and close the ctf_file_t around the
+ loop. (This does not extend their lifetime beyond that of the ctf_archive_t
+ in which they are contained.) */
+
+void
+ctf_ref (ctf_file_t *fp)
+{
+ fp->ctf_refcnt++;
+}
+
/* Close the specified CTF container and free associated data structures. Note
that ctf_file_close() is a reference counted operation: if the specified file
is the parent of other active containers, its reference count will be greater
diff --git a/libctf/libctf.ver b/libctf/libctf.ver
index 375dee8..93616d8 100644
--- a/libctf/libctf.ver
+++ b/libctf/libctf.ver
@@ -24,6 +24,7 @@ LIBCTF_1.0 {
ctf_simple_open;
ctf_create;
ctf_close;
+ ctf_ref;
ctf_file_close;
ctf_cuname;