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From: "Heba Waly via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Heba Waly <heba.waly@gmail.com>,
	Junio C Hamano <gitster@pobox.com>,
	Heba Waly <heba.waly@gmail.com>
Subject: [PATCH v5 11/21] sigchain: move doc to sigchain.h
Date: Sun, 17 Nov 2019 21:04:50 +0000	[thread overview]
Message-ID: <240a4bcb3227224529945c9576b6e49891545841.1574024701.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.434.v5.git.1574024700.gitgitgadget@gmail.com>

From: Heba Waly <heba.waly@gmail.com>

Move the documentation from Documentation/technical/api-sigchain.txt
to sigchain.h as it's easier for the developers to find the usage
information beside the code instead of looking for it in another doc file.

Also documentation/technical/api-sigchain.txt is removed because the
information it has is now redundant and it'll be hard to keep it up to
date and synchronized with the documentation in the header file.

Signed-off-by: Heba Waly <heba.waly@gmail.com>
---
 Documentation/technical/api-sigchain.txt | 41 ---------------------
 sigchain.h                               | 45 ++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 41 deletions(-)
 delete mode 100644 Documentation/technical/api-sigchain.txt

diff --git a/Documentation/technical/api-sigchain.txt b/Documentation/technical/api-sigchain.txt
deleted file mode 100644
index 9e1189ef01..0000000000
--- a/Documentation/technical/api-sigchain.txt
+++ /dev/null
@@ -1,41 +0,0 @@
-sigchain API
-============
-
-Code often wants to set a signal handler to clean up temporary files or
-other work-in-progress when we die unexpectedly. For multiple pieces of
-code to do this without conflicting, each piece of code must remember
-the old value of the handler and restore it either when:
-
-  1. The work-in-progress is finished, and the handler is no longer
-     necessary. The handler should revert to the original behavior
-     (either another handler, SIG_DFL, or SIG_IGN).
-
-  2. The signal is received. We should then do our cleanup, then chain
-     to the next handler (or die if it is SIG_DFL).
-
-Sigchain is a tiny library for keeping a stack of handlers. Your handler
-and installation code should look something like:
-
-------------------------------------------
-  void clean_foo_on_signal(int sig)
-  {
-	  clean_foo();
-	  sigchain_pop(sig);
-	  raise(sig);
-  }
-
-  void other_func()
-  {
-	  sigchain_push_common(clean_foo_on_signal);
-	  mess_up_foo();
-	  clean_foo();
-  }
-------------------------------------------
-
-Handlers are given the typedef of sigchain_fun. This is the same type
-that is given to signal() or sigaction(). It is perfectly reasonable to
-push SIG_DFL or SIG_IGN onto the stack.
-
-You can sigchain_push and sigchain_pop individual signals. For
-convenience, sigchain_push_common will push the handler onto the stack
-for many common signals.
diff --git a/sigchain.h b/sigchain.h
index 138b20f54b..8e6bada892 100644
--- a/sigchain.h
+++ b/sigchain.h
@@ -1,12 +1,57 @@
 #ifndef SIGCHAIN_H
 #define SIGCHAIN_H
 
+/**
+ * Code often wants to set a signal handler to clean up temporary files or
+ * other work-in-progress when we die unexpectedly. For multiple pieces of
+ * code to do this without conflicting, each piece of code must remember
+ * the old value of the handler and restore it either when:
+ *
+ *   1. The work-in-progress is finished, and the handler is no longer
+ *      necessary. The handler should revert to the original behavior
+ *      (either another handler, SIG_DFL, or SIG_IGN).
+ *
+ *   2. The signal is received. We should then do our cleanup, then chain
+ *      to the next handler (or die if it is SIG_DFL).
+ *
+ * Sigchain is a tiny library for keeping a stack of handlers. Your handler
+ * and installation code should look something like:
+ *
+ * ------------------------------------------
+ *   void clean_foo_on_signal(int sig)
+ *   {
+ * 	  clean_foo();
+ * 	  sigchain_pop(sig);
+ * 	  raise(sig);
+ *   }
+ *
+ *   void other_func()
+ *   {
+ * 	  sigchain_push_common(clean_foo_on_signal);
+ * 	  mess_up_foo();
+ * 	  clean_foo();
+ *   }
+ * ------------------------------------------
+ *
+ */
+
+/**
+ * Handlers are given the typedef of sigchain_fun. This is the same type
+ * that is given to signal() or sigaction(). It is perfectly reasonable to
+ * push SIG_DFL or SIG_IGN onto the stack.
+ */
 typedef void (*sigchain_fun)(int);
 
+/* You can sigchain_push and sigchain_pop individual signals. */
 int sigchain_push(int sig, sigchain_fun f);
 int sigchain_pop(int sig);
 
+/**
+ * push the handler onto the stack for the common signals:
+ * SIGINT, SIGHUP, SIGTERM, SIGQUIT and SIGPIPE.
+ */
 void sigchain_push_common(sigchain_fun f);
+
 void sigchain_pop_common(void);
 
 #endif /* SIGCHAIN_H */
-- 
gitgitgadget


  parent reply	other threads:[~2019-11-17 21:05 UTC|newest]

Thread overview: 123+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-29 10:00 [PATCH 00/10] [Outreachy] Move doc to header files Heba Waly via GitGitGadget
2019-10-29 10:00 ` [PATCH 01/10] diff: move doc to diff.h and diffcore.h Heba Waly via GitGitGadget
2019-10-29 10:00 ` [PATCH 02/10] dir: move doc to dir.h Heba Waly via GitGitGadget
2019-10-29 10:00 ` [PATCH 03/10] graph: move doc to graph.h and graph.c Heba Waly via GitGitGadget
2019-10-29 10:00 ` [PATCH 04/10] merge: move doc to ll-merge.h Heba Waly via GitGitGadget
2019-10-30 22:09   ` Elijah Newren
2019-10-31 19:35     ` Heba Waly
2019-11-02  4:28     ` Junio C Hamano
2019-10-29 10:00 ` [PATCH 05/10] sha1-array: move doc to sha1-array.h Heba Waly via GitGitGadget
2019-10-29 10:00 ` [PATCH 06/10] remote: move doc to remote.h and refspec.h Heba Waly via GitGitGadget
2019-10-29 10:00 ` [PATCH 07/10] refs: move doc to refs.h Heba Waly via GitGitGadget
2019-10-29 10:00 ` [PATCH 08/10] attr: move doc to attr.h Heba Waly via GitGitGadget
2019-10-29 10:00 ` [PATCH 09/10] revision: move doc to revision.h Heba Waly via GitGitGadget
2019-10-29 23:57   ` Emily Shaffer
2019-10-29 10:00 ` [PATCH 10/10] pathspec: move doc to pathspec.h Heba Waly via GitGitGadget
2019-11-06  9:59 ` [PATCH v2 00/20] [Outreachy] Move doc to header files Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 01/20] diff: move doc to diff.h and diffcore.h Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 02/20] dir: move doc to dir.h Heba Waly via GitGitGadget
2019-11-07  1:16     ` Emily Shaffer
2019-11-11  0:20       ` Heba Waly
2019-11-06  9:59   ` [PATCH v2 03/20] graph: move doc to graph.h and graph.c Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 04/20] merge: move doc to ll-merge.h Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 05/20] sha1-array: move doc to sha1-array.h Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 06/20] remote: move doc to remote.h and refspec.h Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 07/20] refs: move doc to refs.h Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 08/20] attr: move doc to attr.h Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 09/20] revision: move doc to revision.h Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 10/20] pathspec: move doc to pathspec.h Heba Waly via GitGitGadget
2019-11-07  1:26     ` Emily Shaffer
2019-11-10  1:40       ` Heba Waly
2019-11-06  9:59   ` [PATCH v2 11/20] sigchain: move doc to sigchain.h Heba Waly via GitGitGadget
2019-11-06 22:03     ` Emily Shaffer
2019-11-11  1:04       ` Heba Waly
2019-11-06  9:59   ` [PATCH v2 12/20] cache: move doc to cache.h Heba Waly via GitGitGadget
2019-11-06 22:04     ` Emily Shaffer
2019-11-06  9:59   ` [PATCH v2 13/20] argv-array: move doc to argv-array.h Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 14/20] credential: move doc to credential.h Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 15/20] parse-options: move doc to parse-options.h Heba Waly via GitGitGadget
2019-11-11  2:45     ` Junio C Hamano
2019-11-11 21:38       ` Heba Waly
2019-11-12  5:57         ` Junio C Hamano
2019-11-15  9:55           ` Heba Waly
2019-11-15 11:37             ` Junio C Hamano
2019-11-15 23:28               ` Emily Shaffer
2019-11-17 11:34                 ` Heba Waly
2019-11-06  9:59   ` [PATCH v2 16/20] run-command: move doc to run-command.h Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 17/20] trace: move doc to trace.h Heba Waly via GitGitGadget
2019-11-07  1:32     ` Emily Shaffer
2019-11-06  9:59   ` [PATCH v2 18/20] tree-walk: move doc to tree-walk.h Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 19/20] submodule-config: move doc to submodule-config.h Heba Waly via GitGitGadget
2019-11-06  9:59   ` [PATCH v2 20/20] trace2: move doc to trace2.h Heba Waly via GitGitGadget
2019-11-11 21:27   ` [PATCH v3 00/21] [Outreachy] Move doc to header files Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 01/21] diff: move doc to diff.h and diffcore.h Heba Waly via GitGitGadget
2019-11-12  7:20       ` Junio C Hamano
2019-11-14 12:22         ` Heba Waly
2019-11-11 21:27     ` [PATCH v3 02/21] dir: move doc to dir.h Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 03/21] graph: move doc to graph.h and graph.c Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 04/21] merge: move doc to ll-merge.h Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 05/21] sha1-array: move doc to sha1-array.h Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 06/21] remote: move doc to remote.h and refspec.h Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 07/21] refs: move doc to refs.h Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 08/21] attr: move doc to attr.h Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 09/21] revision: move doc to revision.h Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 10/21] pathspec: move doc to pathspec.h Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 11/21] sigchain: move doc to sigchain.h Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 12/21] cache: move doc to cache.h Heba Waly via GitGitGadget
2019-11-12  7:05       ` Junio C Hamano
2019-11-14 10:14         ` Heba Waly
2019-11-11 21:27     ` [PATCH v3 13/21] argv-array: move doc to argv-array.h Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 14/21] credential: move doc to credential.h Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 15/21] parse-options: move doc to parse-options.h Heba Waly via GitGitGadget
2019-11-11 21:27     ` [PATCH v3 16/21] run-command: move doc to run-command.h Heba Waly via GitGitGadget
2019-11-11 21:28     ` [PATCH v3 17/21] trace: move doc to trace.h Heba Waly via GitGitGadget
2019-11-11 21:28     ` [PATCH v3 18/21] tree-walk: move doc to tree-walk.h Heba Waly via GitGitGadget
2019-11-11 21:28     ` [PATCH v3 19/21] submodule-config: move doc to submodule-config.h Heba Waly via GitGitGadget
2019-11-11 21:28     ` [PATCH v3 20/21] trace2: move doc to trace2.h Heba Waly via GitGitGadget
2019-11-12  7:02       ` Junio C Hamano
2019-11-14 10:30         ` Heba Waly
2019-11-11 21:28     ` [PATCH v3 21/21] api-index: remove api doc index files Heba Waly via GitGitGadget
2019-11-15  9:53     ` [PATCH v4 00/21] [Outreachy] Move doc to header files Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 01/21] diff: move doc to diff.h and diffcore.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 02/21] dir: move doc to dir.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 03/21] graph: move doc to graph.h and graph.c Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 04/21] merge: move doc to ll-merge.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 05/21] sha1-array: move doc to sha1-array.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 06/21] remote: move doc to remote.h and refspec.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 07/21] refs: move doc to refs.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 08/21] attr: move doc to attr.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 09/21] revision: move doc to revision.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 10/21] pathspec: move doc to pathspec.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 11/21] sigchain: move doc to sigchain.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 12/21] cache: move doc to cache.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 13/21] argv-array: move doc to argv-array.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 14/21] credential: move doc to credential.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 15/21] parse-options: move doc to parse-options.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 16/21] run-command: move doc to run-command.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 17/21] trace: move doc to trace.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 18/21] tree-walk: move doc to tree-walk.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 19/21] submodule-config: move doc to submodule-config.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 20/21] trace2: move doc to trace2.h Heba Waly via GitGitGadget
2019-11-15  9:53       ` [PATCH v4 21/21] api-index: remove api doc index files Heba Waly via GitGitGadget
2019-11-17 21:04       ` [PATCH v5 00/21] [Outreachy] Move doc to header files Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 01/21] diff: move doc to diff.h and diffcore.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 02/21] dir: move doc to dir.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 03/21] graph: move doc to graph.h and graph.c Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 04/21] merge: move doc to ll-merge.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 05/21] sha1-array: move doc to sha1-array.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 06/21] remote: move doc to remote.h and refspec.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 07/21] refs: move doc to refs.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 08/21] attr: move doc to attr.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 09/21] revision: move doc to revision.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 10/21] pathspec: move doc to pathspec.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` Heba Waly via GitGitGadget [this message]
2019-11-17 21:04         ` [PATCH v5 12/21] cache: move doc to cache.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 13/21] argv-array: move doc to argv-array.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 14/21] credential: move doc to credential.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 15/21] parse-options: add link to doc file in parse-options.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 16/21] run-command: move doc to run-command.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 17/21] trace: move doc to trace.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 18/21] tree-walk: move doc to tree-walk.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 19/21] submodule-config: move doc to submodule-config.h Heba Waly via GitGitGadget
2019-11-17 21:04         ` [PATCH v5 20/21] trace2: move doc to trace2.h Heba Waly via GitGitGadget
2019-11-17 21:05         ` [PATCH v5 21/21] api-index: remove api doc index files Heba Waly via GitGitGadget

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