From df3c43bedea8d5384a8e1c28fa1dd78ee5aaa6cd Mon Sep 17 00:00:00 2001
From: Christian Groessler <chris@groessler.org>
Date: Thu, 27 Sep 2018 20:22:21 +0200
Subject: [PATCH] Atari: implement clock_getres()

---
 libsrc/apple2/getres.s |  2 +-
 libsrc/atari/getres.s  | 51 ++++++++++++++++++++++++++++++++++++++++++
 libsrc/cbm/getres.s    |  2 +-
 3 files changed, 53 insertions(+), 2 deletions(-)
 create mode 100644 libsrc/atari/getres.s

diff --git a/libsrc/apple2/getres.s b/libsrc/apple2/getres.s
index 777a5df3f..6441671cc 100644
--- a/libsrc/apple2/getres.s
+++ b/libsrc/apple2/getres.s
@@ -1,7 +1,7 @@
 ;
 ; Oliver Schmidt, 15.08.2018
 ;
-; int clock_getres (clockid_t clk_id, struct timespec *res);
+; int __fastcall__ clock_getres (clockid_t clk_id, struct timespec *res);
 ;
 
         .import         __dos_type
diff --git a/libsrc/atari/getres.s b/libsrc/atari/getres.s
new file mode 100644
index 000000000..f2e4874f9
--- /dev/null
+++ b/libsrc/atari/getres.s
@@ -0,0 +1,51 @@
+;
+; Oliver Schmidt, 15.8.2018
+; Christian Groessler, 27.9.2018
+;
+; int __fastcall__ clock_getres (clockid_t clk_id, struct timespec *res);
+;
+
+        .include        "atari.inc"
+        .include        "time.inc"
+        .include        "errno.inc"
+
+        .importzp       ptr1
+        .import         incsp1, return0, __dos_type
+
+;----------------------------------------------------------------------------
+.code
+
+_clock_getres:
+        sta     ptr1
+        stx     ptr1+1
+
+        ; Cleanup stack
+        jsr     incsp1
+
+        ; Check for SpartaDOS-X 4.40 or newer
+        ldy     #SPARTADOS
+        cpy     __dos_type
+        bne     enosys
+        ldy     SDX_VERSION
+        cpy     #$44
+        bcc     enosys
+
+        ldy     #.sizeof(timespec)-1
+@L1:    lda     time,y
+        sta     (ptr1),y
+        dey
+        bpl     @L1
+
+        jmp     return0
+
+enosys: lda     #ENOSYS
+
+        ; Set __errno
+        jmp     __directerrno
+
+;----------------------------------------------------------------------------
+; timespec struct with tv_sec set to 1 second
+.rodata
+
+time:   .dword  1
+        .dword  0
diff --git a/libsrc/cbm/getres.s b/libsrc/cbm/getres.s
index d216a1b6a..998bac9f6 100644
--- a/libsrc/cbm/getres.s
+++ b/libsrc/cbm/getres.s
@@ -1,7 +1,7 @@
 ;
 ; Oliver Schmidt, 15.8.2018
 ;
-; int clock_getres (clockid_t clk_id, struct timespec *res);
+; int __fastcall__ clock_getres (clockid_t clk_id, struct timespec *res);
 ;
 
         .include        "time.inc"