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vfs: watch set-rtc signal in RTC file system 

Issue #3450
This commit is contained in:
Christian Helmuth 2019-08-14 14:02:33 +02:00
parent b8ed80b7dd
commit 1fdd5b636b
1 changed files with 41 additions and 4 deletions
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45
repos/os/src/lib/vfs/rtc_file_system.h
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@ -15,6 +15,7 @@
#define _INCLUDE__VFS__RTC_FILE_SYSTEM_H_
/* Genode includes */
#include <base/registry.h>
#include <rtc_session/connection.h>
#include <vfs/file_system.h>
@ -26,8 +27,6 @@ class Vfs::Rtc_file_system : public Single_file_system
{
private:
Rtc::Connection _rtc;
class Rtc_vfs_handle : public Single_vfs_handle
{
private:
@ -84,13 +83,33 @@ class Vfs::Rtc_file_system : public Single_file_system
bool read_ready() override { return true; }
};
typedef Genode::Registered<Vfs_watch_handle> Registered_watch_handle;
typedef Genode::Registry<Registered_watch_handle> Watch_handle_registry;
Rtc::Connection _rtc;
Watch_handle_registry _handle_registry { };
Genode::Io_signal_handler<Rtc_file_system> _set_signal_handler;
void _handle_set_signal()
{
_handle_registry.for_each([this] (Registered_watch_handle &handle) {
handle.watch_response();
});
}
public:
Rtc_file_system(Vfs::Env &env, Genode::Xml_node config)
:
Single_file_system(NODE_TYPE_CHAR_DEVICE, name(), config),
_rtc(env.env())
{ }
_rtc(env.env()),
_set_signal_handler(env.env().ep(), *this,
&Rtc_file_system::_handle_set_signal)
{
_rtc.set_sigh(_set_signal_handler);
}
static char const *name() { return "rtc"; }
char const *type() override { return "rtc"; }
@ -122,6 +141,24 @@ class Vfs::Rtc_file_system : public Single_file_system
return result;
}
Watch_result watch(char const *path,
Vfs_watch_handle **handle,
Allocator &alloc) override
{
if (!_single_file(path))
return WATCH_ERR_UNACCESSIBLE;
try {
Vfs_watch_handle &watch_handle = *new (alloc)
Registered_watch_handle(_handle_registry, *this, alloc);
*handle = &watch_handle;
return WATCH_OK;
}
catch (Genode::Out_of_ram) { return WATCH_ERR_OUT_OF_RAM; }
catch (Genode::Out_of_caps) { return WATCH_ERR_OUT_OF_CAPS; }
}
};
#endif /* _INCLUDE__VFS__RTC_FILE_SYSTEM_H_ */