/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
- * Copyright 2017 Mike Becker, Olaf Wintermann All rights reserved.
+ * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* POSSIBILITY OF SUCH DAMAGE.
*/
-#include "ucx/mempool.h"
-
-#include <stdlib.h>
+#include "cx/mempool.h"
+#include "cx/utils.h"
#include <string.h>
-#include <stdio.h>
-#ifdef __cplusplus
-#define __STDC_FORMAT_MACROS
-#endif
-#include <inttypes.h>
-
-/** Capsule for destructible memory chunks. */
-typedef struct {
- /** The destructor for the memory chunk. */
- ucx_destructor destructor;
- /**
- * First byte of the memory chunk.
- * Note, that the address <code>&c</code> is also the address
- * of the whole memory chunk.
- */
- char c;
-} ucx_memchunk;
-
-/** Capsule for data and its destructor. */
-typedef struct {
- /** The destructor for the data. */
- ucx_destructor destructor;
- /** A pointer to the data. */
- void *ptr;
-} ucx_regdestr;
-
-#ifdef __cplusplus
-extern "C"
-#endif
-void ucx_mempool_shared_destr(void* ptr) {
- ucx_regdestr *rd = (ucx_regdestr*)ptr;
- rd->destructor(rd->ptr);
-}
-UcxMempool *ucx_mempool_new(size_t n) {
- size_t poolsz;
- if(ucx_szmul(n, sizeof(void*), &poolsz)) {
- return NULL;
- }
-
- UcxMempool *pool = (UcxMempool*)malloc(sizeof(UcxMempool));
- if (!pool) {
- return NULL;
- }
-
- pool->data = (void**) malloc(poolsz);
- if (pool->data == NULL) {
- free(pool);
- return NULL;
- }
-
- pool->ndata = 0;
- pool->size = n;
-
- UcxAllocator *allocator = (UcxAllocator*)malloc(sizeof(UcxAllocator));
- if(!allocator) {
- free(pool->data);
- free(pool);
- return NULL;
- }
- allocator->malloc = (ucx_allocator_malloc)ucx_mempool_malloc;
- allocator->calloc = (ucx_allocator_calloc)ucx_mempool_calloc;
- allocator->realloc = (ucx_allocator_realloc)ucx_mempool_realloc;
- allocator->free = (ucx_allocator_free)ucx_mempool_free;
- allocator->pool = pool;
- pool->allocator = allocator;
-
- return pool;
-}
-
-int ucx_mempool_chcap(UcxMempool *pool, size_t newcap) {
- if (newcap < pool->ndata) {
- return 1;
- }
-
- size_t newcapsz;
- if(ucx_szmul(newcap, sizeof(void*), &newcapsz)) {
- return 1;
- }
-
- void **data = (void**) realloc(pool->data, newcapsz);
- if (data) {
- pool->data = data;
- pool->size = newcap;
- return 0;
- } else {
- return 1;
- }
-}
-
-void *ucx_mempool_malloc(UcxMempool *pool, size_t n) {
- if(((size_t)-1) - sizeof(ucx_destructor) < n) {
- return NULL;
- }
-
- if (pool->ndata >= pool->size) {
- size_t newcap = pool->size*2;
- if (newcap < pool->size || ucx_mempool_chcap(pool, newcap)) {
+struct cx_mempool_memory_s {
+ /** The destructor. */
+ cx_destructor_func destructor;
+ /** The actual memory. */
+ char c[];
+};
+
+static void *cx_mempool_malloc(
+ void *p,
+ size_t n
+) {
+ struct cx_mempool_s *pool = p;
+
+ if (pool->size >= pool->capacity) {
+ size_t newcap = pool->capacity - (pool->capacity % 16) + 16;
+ struct cx_mempool_memory_s **newdata = realloc(pool->data, newcap*sizeof(struct cx_mempool_memory_s*));
+ if (newdata == NULL) {
return NULL;
}
+ pool->data = newdata;
+ pool->capacity = newcap;
}
- void *p = malloc(sizeof(ucx_destructor) + n);
- ucx_memchunk *mem = (ucx_memchunk*)p;
- if (!mem) {
+ struct cx_mempool_memory_s *mem = malloc(sizeof(cx_destructor_func) + n);
+ if (mem == NULL) {
return NULL;
}
- mem->destructor = NULL;
- pool->data[pool->ndata] = mem;
- pool->ndata++;
+ mem->destructor = pool->auto_destr;
+ pool->data[pool->size] = mem;
+ pool->size++;
- return &(mem->c);
+ return mem->c;
}
-void *ucx_mempool_calloc(UcxMempool *pool, size_t nelem, size_t elsize) {
+static void *cx_mempool_calloc(
+ void *p,
+ size_t nelem,
+ size_t elsize
+) {
size_t msz;
- if(ucx_szmul(nelem, elsize, &msz)) {
+ if (cx_szmul(nelem, elsize, &msz)) {
return NULL;
}
-
- void *ptr = ucx_mempool_malloc(pool, msz);
- if (!ptr) {
+ void *ptr = cx_mempool_malloc(p, msz);
+ if (ptr == NULL) {
return NULL;
}
memset(ptr, 0, nelem * elsize);
return ptr;
}
-void *ucx_mempool_realloc(UcxMempool *pool, void *ptr, size_t n) {
- if(((size_t)-1) - sizeof(ucx_destructor) < n) {
- return NULL;
- }
-
- char *mem = ((char*)ptr) - sizeof(ucx_destructor);
- char *newm = (char*) realloc(mem, n + sizeof(ucx_destructor));
- if (!newm) {
+static void *cx_mempool_realloc(
+ void *p,
+ void *ptr,
+ size_t n
+) {
+ struct cx_mempool_s *pool = p;
+
+ struct cx_mempool_memory_s *mem, *newm;
+ mem = (struct cx_mempool_memory_s*)(((char *) ptr) - sizeof(cx_destructor_func));
+ newm = realloc(mem, n + sizeof(cx_destructor_func));
+
+ if (newm == NULL) {
return NULL;
}
if (mem != newm) {
- for(size_t i=0 ; i < pool->ndata ; i++) {
- if(pool->data[i] == mem) {
+ cx_for_n(i, pool->size) {
+ if (pool->data[i] == mem) {
pool->data[i] = newm;
- return newm + sizeof(ucx_destructor);
+ return ((char*)newm) + sizeof(cx_destructor_func);
}
}
- fprintf(stderr, "FATAL: 0x%08" PRIxPTR" not in mpool 0x%08" PRIxPTR"\n",
- (intptr_t)ptr, (intptr_t)pool);
abort();
} else {
- return newm + sizeof(ucx_destructor);
+ return ptr;
}
}
-void ucx_mempool_free(UcxMempool *pool, void *ptr) {
- ucx_memchunk *chunk = (ucx_memchunk*)((char*)ptr-sizeof(ucx_destructor));
- for(size_t i=0 ; i<pool->ndata ; i++) {
- if(chunk == pool->data[i]) {
- if(chunk->destructor != NULL) {
- chunk->destructor(&(chunk->c));
+static void cx_mempool_free(
+ void *p,
+ void *ptr
+) {
+ struct cx_mempool_s *pool = p;
+
+ struct cx_mempool_memory_s *mem = (struct cx_mempool_memory_s *)
+ ((char *) ptr - sizeof(cx_destructor_func));
+
+ cx_for_n(i, pool->size) {
+ if (mem == pool->data[i]) {
+ if (mem->destructor) {
+ mem->destructor(mem->c);
}
- free(chunk);
- size_t last_index = pool->ndata - 1;
- if(i != last_index) {
+ free(mem);
+ size_t last_index = pool->size - 1;
+ if (i != last_index) {
pool->data[i] = pool->data[last_index];
pool->data[last_index] = NULL;
}
- pool->ndata--;
+ pool->size--;
return;
}
}
- fprintf(stderr, "FATAL: 0x%08" PRIxPTR" not in mpool 0x%08" PRIxPTR"\n",
- (intptr_t)ptr, (intptr_t)pool);
abort();
}
-void ucx_mempool_destroy(UcxMempool *pool) {
- ucx_memchunk *chunk;
- for(size_t i=0 ; i<pool->ndata ; i++) {
- chunk = (ucx_memchunk*) pool->data[i];
- if(chunk) {
- if(chunk->destructor) {
- chunk->destructor(&(chunk->c));
- }
- free(chunk);
+void cxMempoolDestroy(CxMempool *pool) {
+ struct cx_mempool_memory_s *mem;
+ cx_for_n(i, pool->size) {
+ mem = pool->data[i];
+ if (mem->destructor) {
+ mem->destructor(mem->c);
}
+ free(mem);
}
free(pool->data);
- free(pool->allocator);
+ free((void*) pool->allocator);
free(pool);
}
-void ucx_mempool_set_destr(void *ptr, ucx_destructor func) {
- *(ucx_destructor*)((char*)ptr-sizeof(ucx_destructor)) = func;
+void cxMempoolSetDestructor(
+ void *ptr,
+ cx_destructor_func func
+) {
+ *(cx_destructor_func *) ((char *) ptr - sizeof(cx_destructor_func)) = func;
}
-void ucx_mempool_reg_destr(UcxMempool *pool, void *ptr, ucx_destructor destr) {
- ucx_regdestr *rd = (ucx_regdestr*)ucx_mempool_malloc(
+struct cx_mempool_foreign_mem_s {
+ cx_destructor_func destr;
+ void* mem;
+};
+
+static void cx_mempool_destr_foreign_mem(void* ptr) {
+ struct cx_mempool_foreign_mem_s *fm = ptr;
+ fm->destr(fm->mem);
+}
+
+int cxMempoolRegister(
+ CxMempool *pool,
+ void *memory,
+ cx_destructor_func destr
+) {
+ struct cx_mempool_foreign_mem_s *fm = cx_mempool_malloc(
pool,
- sizeof(ucx_regdestr));
- rd->destructor = destr;
- rd->ptr = ptr;
- ucx_mempool_set_destr(rd, ucx_mempool_shared_destr);
+ sizeof(struct cx_mempool_foreign_mem_s)
+ );
+ if (fm == NULL) return 1;
+
+ fm->mem = memory;
+ fm->destr = destr;
+ *(cx_destructor_func *) ((char *) fm - sizeof(cx_destructor_func)) = cx_mempool_destr_foreign_mem;
+
+ return 0;
}
+static cx_allocator_class cx_mempool_allocator_class = {
+ cx_mempool_malloc,
+ cx_mempool_realloc,
+ cx_mempool_calloc,
+ cx_mempool_free
+};
+
+CxMempool *cxMempoolCreate(
+ size_t capacity,
+ cx_destructor_func destr
+) {
+ size_t poolsize;
+ if (cx_szmul(capacity, sizeof(struct cx_mempool_memory_s*), &poolsize)) {
+ return NULL;
+ }
+
+ struct cx_mempool_s *pool =
+ malloc(sizeof(struct cx_mempool_s));
+ if (pool == NULL) {
+ return NULL;
+ }
+
+ CxAllocator *provided_allocator = malloc(sizeof(CxAllocator));
+ if (provided_allocator == NULL) {
+ free(pool);
+ return NULL;
+ }
+ provided_allocator->cl = &cx_mempool_allocator_class;
+ provided_allocator->data = pool;
+
+ pool->allocator = provided_allocator;
+
+ pool->data = malloc(poolsize);
+ if (pool->data == NULL) {
+ free(provided_allocator);
+ free(pool);
+ return NULL;
+ }
+
+ pool->size = 0;
+ pool->capacity = capacity;
+ pool->auto_destr = destr;
+
+ return (CxMempool *) pool;
+}
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