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#pragma once
#include <kernel/arch/generic.h>
#include <shared/mem.h>
#include <stddef.h>
/* This seems to be fine for now.
* KMALLOC_MAX >= 2048 would require extending kmalloc with a new allocation
* type. KMALLOC_MAX >= 4096 would require a new (Buddy?) page allocator.
* Both are pretty easy, but I don't want to maintain what would currently be
* dead code. */
#define KMALLOC_MAX 1024
/* also see the string table in malloc.c */
enum MallocTag {
TagInvalid,
TagKernelFs,
TagProcFs,
TagUserFs,
TagOpenPath,
TagMountPath,
TagMountUser,
TagMountRoot,
TagExecbuf,
TagVfsReq,
TagHandleset,
TagHandle,
TagProcess,
TagProcessHandle,
TagDevTime,
TagRootCache,
TagPageRefcount,
TagLast,
};
void mem_init(void *memtop);
void mem_reserve(void *addr, size_t len);
void mem_debugprint(void);
void kmalloc_debugprint(void); /* internal, called by mem_debugprint */
// allocates `pages` consecutive pages
void *page_alloc(size_t pages);
// zeroes the allocated pages
void *page_zalloc(size_t pages);
// frees `pages` consecutive pages starting from *first
void page_free(void *first, size_t pages);
void *kmalloc(size_t len, enum MallocTag tag);
void kfree(void *ptr);
// TODO calloc
static inline void *kzalloc(size_t len, enum MallocTag tag) {
void *b = kmalloc(len, tag);
memset(b, 0, len);
return b;
}
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