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Support external context, heap and lcache (#1778)

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JerryScript should support external context, heap and lcache,
so that it can have multiple instances and runtime configurable heap
size.

Related issue: 1746

JerryScript-DCO-1.0-Signed-off-by: Zidong Jiang zidong.jiang@intel.com
This commit is contained in:
Zidong Jiang
2017-05-20 11:00:19 +08:00
committed by GitHub
parent c6d890ee13
commit 5e28bfc28a
16 changed files with 319 additions and 21 deletions
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jerry-core/api/jerry.c
+58
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@@ -2248,6 +2248,64 @@ jerry_is_valid_cesu8_string (const jerry_char_t *cesu8_buf_p, /**< CESU-8 string
(lit_utf8_size_t) buf_size);
} /* jerry_is_valid_cesu8_string */
/*
* Create a jerry instance for external context.
*
* @return the pointer to the instance.
*/
jerry_instance_t *
jerry_create_instance (uint32_t heap_size, /**< the size of heap */
jerry_instance_alloc_t alloc, /**< the alloc function */
void *cb_data_p) /**< the cb_data for alloc function */
{
#ifdef JERRY_ENABLE_EXTERNAL_CONTEXT
uint32_t lcache_size = 0;
#ifndef CONFIG_ECMA_LCACHE_DISABLE
lcache_size = sizeof (jerry_hash_table_t);
#endif /* !CONFIG_ECMA_LCACHE_DISABLE */
uint32_t alloc_size = (uint32_t) (sizeof (jerry_instance_t) + lcache_size);
#ifndef JERRY_SYSTEM_ALLOCATOR
alloc_size = alloc_size + heap_size + JMEM_ALIGNMENT - 1;
#endif /* !JERRY_SYSTEM_ALLOCATOR */
jerry_instance_t *instance_p = (jerry_instance_t *) alloc (alloc_size, cb_data_p);
memset (instance_p, 0, alloc_size);
if (instance_p == NULL)
{
return NULL;
}
instance_p->heap_size = heap_size;
instance_p->lcache_p = instance_p->buffer;
#ifndef JERRY_SYSTEM_ALLOCATOR
uint8_t *unaligned_heap_p = instance_p->lcache_p + lcache_size;
uintptr_t alignment_mask = ~(uintptr_t) (JMEM_ALIGNMENT - 1);
instance_p->heap_p = (uint8_t *) (((uintptr_t) unaligned_heap_p + JMEM_ALIGNMENT - 1) & alignment_mask);
JERRY_ASSERT (((uintptr_t) instance_p->heap_p & (uintptr_t) (JMEM_ALIGNMENT - 1)) == 0);
#endif /* !JERRY_SYSTEM_ALLOCATOR */
return instance_p;
#else /* !JERRY_ENABLE_EXTERNAL_CONTEXT */
JERRY_UNUSED (heap_size);
JERRY_UNUSED (alloc);
JERRY_UNUSED (cb_data_p);
return NULL;
#endif /* JERRY_ENABLE_EXTERNAL_CONTEXT */
} /* jerry_create_instance */
/**
* If JERRY_VM_EXEC_STOP is defined the callback passed to this function is
* periodically called with the user_p argument. If frequency is greater