X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Fkernel%2Fao_task.h;h=7549b59838d6abbc4c85a22e5b42ae4ce7e9449e;hb=5a26df7db9453bf0596f729a23efb90e5e8a63c7;hp=9c56b48021d6dd4ebe83c69f44aa04c5ade023c3;hpb=24167015705ae831692b95735968b04a876f935e;p=fw%2Faltos

diff --git a/src/kernel/ao_task.h b/src/kernel/ao_task.h
index 9c56b480..7549b598 100644
--- a/src/kernel/ao_task.h
+++ b/src/kernel/ao_task.h
@@ -3,7 +3,8 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -25,6 +26,17 @@
 #define HAS_TASK_INFO 1
 #endif
 
+/* arm stacks must be 32-bit aligned */
+#ifdef __arm__
+#define AO_STACK_ALIGNMENT __attribute__ ((aligned(4)))
+#endif
+#ifdef SDCC
+#define AO_STACK_ALIGNMENT
+#endif
+#ifdef __AVR__
+#define AO_STACK_ALIGNMENT
+#endif
+
 /* An AltOS task */
 struct ao_task {
 	__xdata void *wchan;		/* current wait channel (NULL if running) */
@@ -32,11 +44,14 @@ struct ao_task {
 	ao_arch_task_members		/* any architecture-specific fields */
 	uint8_t task_id;		/* unique id */
 	__code char *name;		/* task name */
+#ifdef NEWLIB
+	int __errno;			/* storage for errno in newlib libc */
+#endif
 #if HAS_TASK_QUEUE
 	struct ao_list	queue;
 	struct ao_list	alarm_queue;
 #endif
-	uint8_t	stack[AO_STACK_SIZE];	/* saved stack */
+	uint8_t stack[AO_STACK_SIZE] AO_STACK_ALIGNMENT;	/* saved stack */
 #if HAS_SAMPLE_PROFILE
 	uint32_t ticks;
 	uint32_t yields;
@@ -56,6 +71,10 @@ extern __data uint8_t ao_num_tasks;
 extern __xdata struct ao_task *__data ao_cur_task;
 extern __data uint8_t ao_task_minimize_latency;	/* Reduce IRQ latency */
 
+#ifndef HAS_ARCH_VALIDATE_CUR_STACK
+#define ao_validate_cur_stack()
+#endif
+
 /*
  ao_task.c
  */
@@ -68,10 +87,19 @@ extern __data uint8_t ao_task_minimize_latency;	/* Reduce IRQ latency */
 uint8_t
 ao_sleep(__xdata void *wchan);
 
+/* Suspend the current task until wchan is awoken or the timeout
+ * expires. returns:
+ *  0 on normal wake
+ *  1 on alarm
+ */
+uint8_t
+ao_sleep_for(__xdata void *wchan, uint16_t timeout);
+
 /* Wake all tasks sleeping on wchan */
 void
 ao_wakeup(__xdata void *wchan) __reentrant;
 
+#if 0
 /* set an alarm to go off in 'delay' ticks */
 void
 ao_alarm(uint16_t delay);
@@ -79,6 +107,7 @@ ao_alarm(uint16_t delay);
 /* Clear any pending alarm */
 void
 ao_clear_alarm(void);
+#endif
 
 /* Yield the processor to another task */
 void