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From: "oliver dot kellogg at sysde dot eads dot net" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug ada/14195] New: Suggestion for System.OS_Interface.struct_sigaction Date: Wed, 18 Feb 2004 16:31:00 -0000 [thread overview] Message-ID: <20040218163116.14195.oliver.kellogg@sysde.eads.net> (raw) This is a wish, not a bug. It applies to all recent versions of GNAT up to and including GNU CVS mainline of 2004/02/18. The type struct_sigaction in package System.OS_Interface is defined as follows: type struct_sigaction is record sa_handler : System.Address; sa_mask : sigset_t; sa_flags : int; end record; pragma Convention (C, struct_sigaction); I suggest making the sa_mask component aliased, i.e. sa_mask : aliased sigset_t; Reason: The common use case is to create a sigset_t using the function sigemptyset (set : access sigset_t) return int; or other function from the same package. If the sa_mask component in struct_sigaction is made aliased then the usage is simplified: declare sa : struct_sigaction; retval : int := sigemptyset (sa.sa_mask'access); begin ... end; Without the aliasing, it is necessary to use a separate temporary variable for the sigset_t: declare temp_sigset : aliased sigset_t; sa : struct_sigaction; retval : int := sigemptyset (temp_sigset'access); begin sa.sa_mask := temp_sigset; end; Thanks. -- Summary: Suggestion for System.OS_Interface.struct_sigaction Product: gcc Version: unknown Status: UNCONFIRMED Severity: minor Priority: P3 Component: ada AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: oliver dot kellogg at sysde dot eads dot net CC: gcc-bugs at gcc dot gnu dot org GCC build triplet: - GCC host triplet: - GCC target triplet: i386-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14195
next reply other threads:[~2004-02-18 16:31 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2004-02-18 16:31 oliver dot kellogg at sysde dot eads dot net [this message] 2004-02-18 16:59 ` [Bug ada/14195] " charlet at gcc dot gnu dot org 2004-02-20 11:27 ` oliver dot kellogg at sysde dot eads dot net
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