Implemented send_data/receive_data/has_data thread syscalls

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@815 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/kernel/OS.h

@@ -352,6 +352,10 @@ int       suspend_thread(thread_id thread);
 
 thread_id find_thread(const char *);
 
+status_t send_data(thread_id thread, int32 code, const void *buffer, size_t buffer_size);
+status_t receive_data(thread_id *sender, void *buffer, size_t buffer_size);
+bool has_data(thread_id thread);
+
 status_t snooze(bigtime_t);
 
 status_t _get_thread_info(thread_id id, thread_info *info, size_t size);

headers/os/kernel/thread_types.h

@@ -18,6 +18,7 @@ extern "C" {
 
 #include <stage2.h>
 #include <ktypes.h>
+#include <cbuf.h>
 #include <vm.h>
 #include <smp.h>
 #include <arch/thread_struct.h>
@@ -108,6 +109,14 @@ struct thread {
 	int sem_deleted_retcode;
 	int sem_errcode;
 	int sem_flags;
+	struct {
+		sem_id write_sem;
+		sem_id read_sem;
+		thread_id sender;
+		int32 code;
+		size_t size;
+		cbuf *buffer;
+	} msg;
 	addr fault_handler;
 	addr entry;
 	void *args;

headers/private/kernel/ksyscalls.h

@@ -102,6 +102,9 @@ enum {
 	SYSCALL_GET_NEXT_TEAM_INFO,
 	SYSCALL_CREATE_LINK,
 	SYSCALL_REMOVE_DIR,
+	SYSCALL_SEND_DATA,
+	SYSCALL_RECEIVE_DATA,
+	SYSCALL_HAS_DATA,
 };
 
 int syscall_dispatcher(unsigned long call_num, void *arg_buffer, uint64 *call_ret);

headers/private/kernel/thread.h

@@ -83,6 +83,9 @@ int user_team_wait_on_team(team_id id, int *uretcode);
 thread_id user_thread_create_user_thread(addr, team_id, const char*, 
                                          int, void *);
 
+status_t user_send_data(thread_id thread, int32 code, const void *buffer, size_t buffer_size);
+status_t user_receive_data(thread_id *sender, void *buffer, size_t buffer_size);
+
 status_t user_get_thread_info(thread_id id, thread_info *info);
 status_t user_get_next_thread_info(team_id team, int32 *cookie, thread_info *info);
 status_t user_get_team_info(team_id id, team_info *info);