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altos: Declare task stack as union of uint8_t and uint32_t
[fw/altos]
/
src
/
kernel
/
ao_task.h
diff --git
a/src/kernel/ao_task.h
b/src/kernel/ao_task.h
index f3789fa2cd2725a6fd3207561e124263815ed530..d27ef060384b375100930fd886d0fb7506326d3f 100644
(file)
--- a/
src/kernel/ao_task.h
+++ b/
src/kernel/ao_task.h
@@
-27,31
+27,34
@@
#endif
/* arm stacks must be 32-bit aligned */
#endif
/* arm stacks must be 32-bit aligned */
+#ifndef AO_STACK_ALIGNMENT
#ifdef __arm__
#define AO_STACK_ALIGNMENT __attribute__ ((aligned(4)))
#ifdef __arm__
#define AO_STACK_ALIGNMENT __attribute__ ((aligned(4)))
-#endif
-#ifdef SDCC
+#else
#define AO_STACK_ALIGNMENT
#endif
#define AO_STACK_ALIGNMENT
#endif
-#ifdef __AVR__
-#define AO_STACK_ALIGNMENT
#endif
/* An AltOS task */
struct ao_task {
#endif
/* An AltOS task */
struct ao_task {
- void *wchan; /* current wait channel (NULL if running) */
+ void *wchan;
/* current wait channel (NULL if running) */
uint16_t alarm; /* abort ao_sleep time */
uint16_t alarm; /* abort ao_sleep time */
- ao_arch_task_members /* any architecture-specific fields */
- uint8_t task_id; /* unique id */
+ uint16_t task_id; /* unique id */
+ /* Saved stack pointer */
+ union {
+ uint32_t *sp32;
+ uint8_t *sp8;
+ };
const char *name; /* task name */
const 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
#if HAS_TASK_QUEUE
struct ao_list queue;
struct ao_list alarm_queue;
#endif
- uint8_t stack[AO_STACK_SIZE] AO_STACK_ALIGNMENT; /* saved stack */
+ /* Provide both 32-bit and 8-bit stacks, always 32-bit aligned */
+ union {
+ uint32_t stack32[AO_STACK_SIZE>>2];
+ uint8_t stack8[AO_STACK_SIZE];
+ };
#if HAS_SAMPLE_PROFILE
uint32_t ticks;
uint32_t yields;
#if HAS_SAMPLE_PROFILE
uint32_t ticks;
uint32_t yields;