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eo2: call stack grows and shrinks

This commit is contained in:
Jérémy Zurcher 2013-12-30 15:24:15 +01:00 committed by Tom Hacohen
parent 5f311223ad
commit ae536bdd84
1 changed files with 56 additions and 14 deletions
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70
src/lib/eo/eo.c
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@ -269,9 +269,9 @@ _eo_kls_itr_func_get(const _Eo_Class *cur_klass, Eo_Op op)
EAPI Eo2_Hook_Call eo2_hook_call_pre = NULL;
EAPI Eo2_Hook_Call eo2_hook_call_post = NULL;
// FIXME: per thread stack, grow/shrink
// FIXME: Thread Local Storage
#define EO2_INVALID_DATA (void *) -1
#define EO2_CALL_STACK_DEPTH 100
#define EO2_CALL_STACK_DEPTH 30
typedef struct _Eo2_Stack_Frame
{
@ -287,9 +287,11 @@ typedef struct _Eo2_Stack_Frame
typedef struct _Eo2_Call_Stack {
Eo2_Stack_Frame *stack;
Eo2_Stack_Frame *frame_ptr;
Eo2_Stack_Frame *last_frame;
Eo2_Stack_Frame *shrink_frame;
} Eo2_Call_Stack;
static Eo2_Call_Stack eo2_call_stack = { NULL, NULL };
static Eo2_Call_Stack eo2_call_stack = { NULL, NULL, NULL, NULL };
static Eina_Bool
_eo2_call_stack_init()
@ -299,7 +301,9 @@ _eo2_call_stack_init()
return EINA_FALSE;
// first frame is never used
eo2_call_stack.frame_ptr = &eo2_call_stack.stack[0];
eo2_call_stack.frame_ptr = eo2_call_stack.stack;
eo2_call_stack.last_frame = &eo2_call_stack.stack[EO2_CALL_STACK_DEPTH - 1];
eo2_call_stack.shrink_frame = eo2_call_stack.stack;
return EINA_TRUE;
}
@ -311,6 +315,40 @@ _eo2_call_stack_free()
free(eo2_call_stack.stack);
}
static inline void
_eo2_call_stack_resize(Eina_Bool grow)
{
size_t sz, next_sz;
int frame_offset;
frame_offset = eo2_call_stack.frame_ptr - eo2_call_stack.stack;
sz = eo2_call_stack.last_frame - eo2_call_stack.stack + 1;
if (grow)
next_sz = sz << 1;
else
next_sz = sz >> 1;
DBG("resize from %lu to %lu", sz, next_sz);
eo2_call_stack.stack = realloc(eo2_call_stack.stack, next_sz * sizeof(Eo2_Stack_Frame));
if(!eo2_call_stack.stack)
{
CRI("unable to resize call stack, abort.");
abort();
}
eo2_call_stack.frame_ptr = &eo2_call_stack.stack[frame_offset];
eo2_call_stack.last_frame = &eo2_call_stack.stack[next_sz - 1];
if (grow)
frame_offset = (sz >> 1);
if (next_sz == EO2_CALL_STACK_DEPTH)
frame_offset = 0;
else
frame_offset = (next_sz >> 1);
eo2_call_stack.shrink_frame = &eo2_call_stack.stack[frame_offset];
}
static inline Eina_Bool
_eo2_do_internal(const Eo *eo_id, const Eo_Class *cur_klass_id,
Eina_Bool is_super, Eo2_Stack_Frame *fptr, Eo2_Stack_Frame *pfptr)
@ -346,18 +384,16 @@ _eo2_do_start(const Eo *eo_id, const Eo_Class *cur_klass_id, Eina_Bool is_super,
{
Eo2_Stack_Frame *fptr, *pfptr;
if (eo2_call_stack.frame_ptr == eo2_call_stack.last_frame)
_eo2_call_stack_resize(EINA_TRUE);
fptr = eo2_call_stack.frame_ptr;
if (((fptr - eo2_call_stack.stack) + 1) >= EO2_CALL_STACK_DEPTH)
{
ERR("eo2 call stack overflow !!!");
return EINA_FALSE;
}
pfptr = ((eo_id) && (fptr->eo_id == eo_id) ? fptr : NULL);
fptr++;
if (!_eo2_do_internal(eo_id, cur_klass_id, is_super, fptr, pfptr))
return EINA_FALSE;
return EINA_FALSE;
if(_eo_is_a_class(eo_id))
{
@ -389,10 +425,16 @@ _eo2_do_end(const Eo **eo_id EINA_UNUSED)
memset(fptr, 0, sizeof (Eo2_Stack_Frame));
fptr->obj_data = EO2_INVALID_DATA;
if (fptr == &eo2_call_stack.stack[0])
ERR("eo2 call stack underflow !!!");
else
eo2_call_stack.frame_ptr--;
if (fptr == eo2_call_stack.stack)
{
CRI("call stack underflow, abort.");
abort();
}
eo2_call_stack.frame_ptr--;
if (fptr == eo2_call_stack.shrink_frame)
_eo2_call_stack_resize(EINA_FALSE);
}
EAPI Eina_Bool