* Implemented APM generic syscall API to query the current power status.

* PowerStatus is now using this API when compiled for Haiku.
* Note, I'm not sure why yet, but running PowerStatus in the background
  crashes at least my laptop after some time.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21154 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/arch/x86/apm.h

@@ -47,6 +47,17 @@ typedef struct apm_info {
 } apm_info;
 
 
+// temporary generic syscall interface
+#define APM_SYSCALLS "apm"
+#define APM_GET_BATTERY_INFO	1
+
+struct battery_info {
+	bool	online;
+	int32	percent;
+	time_t	time_left;
+};
+
+
 #ifndef _BOOT_MODE
 #ifdef __cplusplus
 extern "C" {