access_virt_barray access_virt_sarray ALIGN_TYPE alloc_barray alloc_large alloc_sarray alloc_small AM_MEMORY_MANAGER do_barray_io do_sarray_io extra_pool_slop first_pool_slop free_pool jinit_memory_mgr JPEG_INTERNALS JPP large_pool_ptr MIN_SLOP my_mem_ptr out_of_memory realize_virt_arrays request_virt_barray request_virt_sarray self_destruct small_pool_ptr

alloc_barray ( j_common_ptr  cinfo, int  pool_id, JDIMENSION  blocksperrow, JDIMENSION  numrows  ) Definition at line 443 of file jmemmgr.c. Referenced by jinit_memory_mgr(), and realize_virt_arrays(). { my_mem_ptr mem = (my_mem_ptr) cinfo->mem; JBLOCKARRAY result; JBLOCKROW workspace; JDIMENSION rowsperchunk, currow, i; long ltemp; /* Calculate max # of rows allowed in one allocation chunk */ ltemp = (MAX_ALLOC_CHUNK-SIZEOF(large_pool_hdr)) / ((long) blocksperrow * SIZEOF(JBLOCK)); if (ltemp <= 0) ERREXIT(cinfo, JERR_WIDTH_OVERFLOW); if (ltemp < (long) numrows) rowsperchunk = (JDIMENSION) ltemp; else rowsperchunk = numrows; mem->last_rowsperchunk = rowsperchunk; /* Get space for row pointers (small object) */ result = (JBLOCKARRAY) alloc_small(cinfo, pool_id, (size_t) (numrows * SIZEOF(JBLOCKROW))); /* Get the rows themselves (large objects) */ currow = 0; while (currow < numrows) { rowsperchunk = MIN(rowsperchunk, numrows - currow); workspace = (JBLOCKROW) alloc_large(cinfo, pool_id, (size_t) ((size_t) rowsperchunk * (size_t) blocksperrow * SIZEOF(JBLOCK))); for (i = rowsperchunk; i > 0; i--) { result[currow++] = workspace; workspace += blocksperrow; } } return result; }