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59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/** Memory pool for fixed size objects.
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2017, Institute for Automation of Complex Power Systems, EONERC
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*********************************************************************************/
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#include "utils.h"
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#include "pool.h"
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#include "memory.h"
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#include "kernel/kernel.h"
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int pool_init(struct pool *p, size_t cnt, size_t blocksz, struct memtype *m)
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{
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int ret;
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assert(p->state == STATE_DESTROYED);
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/* Make sure that we use a block size that is aligned to the size of a cache line */
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p->alignment = kernel_get_cacheline_size();
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p->blocksz = p->alignment * CEIL(blocksz, p->alignment);
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p->len = cnt * p->blocksz;
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p->mem = m;
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void *buffer = memory_alloc_aligned(m, p->len, p->alignment);
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if (!buffer)
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serror("Failed to allocate memory for memory pool");
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else
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debug(LOG_POOL | 4, "Allocated %#zx bytes for memory pool", p->len);
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p->buffer_off = (char*) buffer - (char*) p;
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ret = queue_init(&p->queue, LOG2_CEIL(cnt), m);
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if (ret)
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return ret;
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for (int i = 0; i < cnt; i++)
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queue_push(&p->queue, (char *) buffer + i * p->blocksz);
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p->state = STATE_INITIALIZED;
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return 0;
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}
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int pool_destroy(struct pool *p)
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{
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int ret;
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if (p->state == STATE_DESTROYED)
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return 0;
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queue_destroy(&p->queue);
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void *buffer = (char*) p + p->buffer_off;
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ret = memory_free(p->mem, buffer, p->len);
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if (ret == 0)
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p->state = STATE_DESTROYED;
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return ret;
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}
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