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author | midipix <writeonce@midipix.org> | 2015-07-27 04:01:18 -0400 |
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committer | midipix <writeonce@midipix.org> | 2015-07-27 04:01:18 -0400 |
commit | dd89bb8ad4fe184a34b5dbdda237e640fc82121b (patch) | |
tree | 5e80d2da35f5892f92be29f57982b2708e6bd99b /src/blitter/ntapi_blt_alloc.c | |
parent | dcdadc2702712fa750ed255ed1dfa354522797a0 (diff) | |
download | ntapi-dd89bb8ad4fe184a34b5dbdda237e640fc82121b.tar.bz2 ntapi-dd89bb8ad4fe184a34b5dbdda237e640fc82121b.tar.xz |
entered advanced internal development stage.
Diffstat (limited to 'src/blitter/ntapi_blt_alloc.c')
-rw-r--r-- | src/blitter/ntapi_blt_alloc.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/blitter/ntapi_blt_alloc.c b/src/blitter/ntapi_blt_alloc.c new file mode 100644 index 0000000..4ba6f2c --- /dev/null +++ b/src/blitter/ntapi_blt_alloc.c @@ -0,0 +1,149 @@ +/********************************************************/ +/* ntapi: Native API core library */ +/* Copyright (C) 2013,2014,2015 Z. Gilboa */ +/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */ +/********************************************************/ + +#include <ntapi/nt_status.h> +#include <ntapi/nt_blitter.h> +#include <ntapi/nt_sync.h> +#include <ntapi/ntapi.h> +#include <ntapi/nt_atomic.h> +#include "ntapi_blitter.h" +#include "ntapi_impl.h" + +static int __blt_popcount(uintptr_t mask) +{ + /* todo: check cpuid, use at_popcount */ + int i,ret; + + for (i=0,ret=0; i<8*sizeof(uintptr_t); i++) + if (mask & ((uintptr_t)1<<i)) + ret++; + + return ret; +} + + +int32_t __fastcall __ntapi_blt_alloc( + __out nt_blitter ** blitter, + __in nt_blitter_params * params) +{ + int32_t status; + nt_blitter * blt_ctx; + size_t blt_ctx_size; + size_t params_size; + size_t ptrs,i; + + /* alignment */ + if ((params->block_size % sizeof(uintptr_t)) || (params->block_count % sizeof(uintptr_t))) + return NT_STATUS_INVALID_PARAMETER; + + /* blt control block allocation */ + ptrs = params->block_count / (8 * sizeof(uintptr_t)); + blt_ctx = (nt_blitter *)0; + blt_ctx_size = (size_t)&((nt_blitter *)0)->bits; + + /* user-provided bitmap? */ + if (!params->bitmap) + blt_ctx_size += ptrs * sizeof(uintptr_t); + + /* alloc */ + status = __ntapi->zw_allocate_virtual_memory( + NT_CURRENT_PROCESS_HANDLE, + (void **)&blt_ctx, + 0, + &blt_ctx_size, + NT_MEM_COMMIT, + NT_PAGE_READWRITE); + + if (status) return (status); + + /* init control block */ + __ntapi->tt_aligned_block_memset( + blt_ctx, + 0,(size_t)&((nt_blitter *)0)->bits); + + blt_ctx->addr = blt_ctx; + blt_ctx->size = blt_ctx_size; + blt_ctx->ptrs = ptrs; + + /* init bitmap */ + blt_ctx->bitmap = params->bitmap + ? (uintptr_t *)params->bitmap + : blt_ctx->bits; + + if (!(params->flags & NT_BLITTER_PRESERVE_BITS)) + __ntapi->tt_aligned_block_memset( + blt_ctx->bitmap, + (intptr_t)0xFFFFFFFFFFFFFFFF, + ptrs * sizeof(uintptr_t)); + + /* info structure */ + blt_ctx->info.info_size = sizeof(nt_blitter_info); + blt_ctx->info.block_count = params->block_count; + blt_ctx->info.block_size = params->block_size; + + if (params->flags & NT_BLITTER_ENABLE_BLOCK_ARRAY) + /* allocate in place */ + blt_ctx->info.region_size = params->block_count * params->block_size; + else + /* use pointer array */ + blt_ctx->info.region_size = params->block_count * sizeof(uintptr_t); + + /* allocate region */ + if (params->region) + blt_ctx->info.region_addr = params->region; + else + status = __ntapi->zw_allocate_virtual_memory( + NT_CURRENT_PROCESS_HANDLE, + &blt_ctx->info.region_addr, + 0, + &blt_ctx->info.region_size, + NT_MEM_COMMIT, + NT_PAGE_READWRITE); + + if (status) { + __ntapi->blt_free(blt_ctx); + return status; + } + + if (params->flags & NT_BLITTER_PRESERVE_BITS) + for (i=0,blt_ctx->info.blocks_avail=0; i<ptrs; i++) + blt_ctx->info.blocks_avail += __blt_popcount(blt_ctx->bitmap[i]); + else + blt_ctx->info.blocks_avail = params->block_count; + + if (params->flags & NT_BLITTER_ENABLE_BLOCK_ARRAY) + blt_ctx->info.blocks_cached = params->block_count; + + /* init block array */ + if (!params->region) + __ntapi->tt_aligned_block_memset( + blt_ctx->info.region_addr, + 0,blt_ctx->info.region_size); + + /* copy params */ + if (params->params_size < sizeof(nt_blitter_params)) + params_size = params->params_size; + else + params_size = sizeof(nt_blitter_params); + + __ntapi->tt_aligned_block_memcpy( + (uintptr_t *)&blt_ctx->params, + (uintptr_t *)params, + params_size); + + /* update params */ + blt_ctx->params.lock_tries = params->lock_tries + ? params->lock_tries + : __NT_BLITTER_DEFAULT_LOCK_TRIES; + + blt_ctx->params.round_trips = params->round_trips + ? params->round_trips + : __NT_BLITTER_DEFAULT_ROUND_TRIPS; + + *blitter = blt_ctx; + + return NT_STATUS_SUCCESS; +} |