Initial project import

tools/v/vlib/builtin/builtin_notd_gcboehm.c.v

@@ -0,0 +1,68 @@
+module builtin
+
+// Just define the C functions, so that V does not error because of the missing definitions.
+
+// Note: they will NOT be used, since calls to them are wrapped with `$if gcboehm ? { }`
+
+fn C.GC_MALLOC(n usize) voidptr
+
+fn C.GC_MALLOC_ATOMIC(n usize) voidptr
+
+fn C.GC_MALLOC_UNCOLLECTABLE(n usize) voidptr
+
+fn C.GC_REALLOC(ptr voidptr, n usize) voidptr
+
+fn C.GC_FREE(ptr voidptr)
+
+fn C.GC_memalign(align isize, size isize) voidptr
+
+fn C.GC_get_heap_usage_safe(pheap_size &usize, pfree_bytes &usize, punmapped_bytes &usize, pbytes_since_gc &usize,
+	ptotal_bytes &usize)
+
+fn C.GC_get_memory_use() usize
+
+fn C.GC_gcollect()
+
+// gc_check_leaks is useful for detecting leaks, but it needs the GC to run.
+// When GC is not used, it is a NOP.
+pub fn gc_check_leaks() {}
+
+// gc_is_enabled() returns true, if the GC is enabled at runtime.
+// It will always return false, with `-gc none`.
+// See also gc_disable() and gc_enable().
+pub fn gc_is_enabled() bool {
+	return false
+}
+
+// gc_enable explicitly enables the GC.
+// Note, that garbage collections are done automatically, when needed in most cases,
+// and also that by default the GC is on, so you do not need to enable it.
+// See also gc_disable() and gc_collect().
+// Note that gc_enable() is a NOP with `-gc none`.
+pub fn gc_enable() {}
+
+// gc_disable explicitly disables the GC.
+// Do not forget to enable it again by calling gc_enable(), when your program is otherwise idle, and can afford it.
+// See also gc_enable() and gc_collect().
+// Note that gc_disable() is a NOP with `-gc none`.
+pub fn gc_disable() {}
+
+// gc_collect explicitly performs a garbage collection.
+// When the GC is not on, (with `-gc none`), it is a NOP.
+pub fn gc_collect() {}
+
+pub type FnGC_WarnCB = fn (msg &char, arg usize)
+
+fn C.GC_get_warn_proc() FnGC_WarnCB
+fn C.GC_set_warn_proc(cb FnGC_WarnCB)
+
+// gc_get_warn_proc returns the current callback fn, that will be used for printing GC warnings.
+// When the GC is not on, it is a NOP.
+pub fn gc_get_warn_proc() {}
+
+// gc_set_warn_proc sets the callback fn, that will be used for printing GC warnings.
+// When the GC is not on, it is a NOP.
+pub fn gc_set_warn_proc(cb FnGC_WarnCB) {}
+
+// used by builtin_init
+fn internal_gc_warn_proc_none(msg &char, arg usize) {}