_platforms_2_p_s5_2_ak_memory_mgr_funcs_8h

Wwise SDK 2023.1.3

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 released in source code form as part of the SDK installer package.
  
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 may use this file in accordance with the end user license agreement provided 
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 "Apache License"); you may not use this file except in compliance with the 
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 OR CONDITIONS OF ANY KIND, either express or implied. See the Apache License for
 the specific language governing permissions and limitations under the License.
  
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 #pragma once
  
 #include <AK/SoundEngine/Common/AkTypes.h>
 #include <sys/dmem.h>
 #include <sceerror.h>
  
 #define AK_VM_PAGE_SIZE        (64*1024)
 #define AK_VM_HUGE_PAGE_SIZE   (2*1024*1024)
 #define AK_VM_DEVICE_PAGE_SIZE (64*1024)
  
 namespace AKPLATFORM
 {
  
     // In order to use ACM hardware accelerated functions, Wwise must have GPU-visible memory
     const int kMemoryFlags = SCE_KERNEL_PROT_CPU_RW | SCE_KERNEL_PROT_GPU_RW | SCE_KERNEL_PROT_AMPR_ALL;
     const int kDeviceMemoryFlags = SCE_KERNEL_PROT_CPU_RW | SCE_KERNEL_PROT_GPU_RW | SCE_KERNEL_PROT_AMPR_ALL | SCE_KERNEL_PROT_ACP_RW;
  
     AkForceInline void* AllocVM(size_t size, size_t* extra)
     {
         AKASSERT((size % AK_VM_PAGE_SIZE) == 0);
         off_t directMemStart = 0;
         void* ptr = NULL;
  
         int32_t err;
         // if size lines up with huge pages, set alignment up similarly
         int32_t alignment = (size % AK_VM_HUGE_PAGE_SIZE == 0) ? AK_VM_HUGE_PAGE_SIZE : AK_VM_PAGE_SIZE;
         err = sceKernelAllocateMainDirectMemory(size, alignment, SCE_KERNEL_MTYPE_C_SHARED, &directMemStart);
         if (err == SCE_OK)
         {
             // allocate with device memory flags all of the time, in case a separate device heap is not in use
             err = sceKernelMapDirectMemory(&ptr, size, AKPLATFORM::kDeviceMemoryFlags, 0, directMemStart, alignment);
             AKASSERT(ptr);
             AKASSERT(err == SCE_OK);
  
             *extra = (size_t)directMemStart;
         }
         return ptr;
     }
  
     AkForceInline void FreeVM(void* address, size_t size, size_t extra, size_t release)
     {
         if (release)
         {
             AKASSERT(extra);
             off_t directMemStart = (off_t)extra;
             int32_t err = sceKernelReleaseDirectMemory(directMemStart, release);
             AKASSERT(err == SCE_OK);
         }
     }
  
     AkForceInline void* AllocDevice(size_t size, size_t* extra)
     {
         AKASSERT((size % AK_VM_DEVICE_PAGE_SIZE) == 0);
         off_t directMemStart = 0;
         void* ptr = NULL;
  
         int32_t err;
         // if size lines up with huge pages, set alignment up similarly
         int32_t alignment = (size % AK_VM_HUGE_PAGE_SIZE == 0) ? AK_VM_HUGE_PAGE_SIZE : AK_VM_DEVICE_PAGE_SIZE;
         err = sceKernelAllocateMainDirectMemory(size, alignment, SCE_KERNEL_MTYPE_C_SHARED, &directMemStart);
         if (err == SCE_OK)
         {
             err = sceKernelMapDirectMemory(&ptr, size, AKPLATFORM::kDeviceMemoryFlags, 0, directMemStart, alignment);
             AKASSERT(ptr);
             AKASSERT(err == SCE_OK);
  
             *extra = (size_t)directMemStart;
         }
         return ptr;
     }
  
     AkForceInline void FreeDevice(void* address, size_t size, size_t extra, size_t release)
     {
         if (release)
         {
             AKASSERT(extra);
             off_t directMemStart = (off_t)extra;
             int32_t err = sceKernelReleaseDirectMemory(directMemStart, release);
             AKASSERT(err == SCE_OK);
         }
     }
  
     AkForceInline bool CheckMemoryProtection(void* address, size_t size, int expectedProt)
     {
         void* pStart, * pEnd;
         int prot;
  
         AkUIntPtr addressEnd = (AkUIntPtr)address + size - 1;
  
         // Check protection flags apply to the whole range
         while ((AkUIntPtr)address < addressEnd)
         {
             int err = sceKernelQueryMemoryProtection(address, &pStart, &pEnd, &prot);
             if (err != SCE_OK)
                 return false;
  
             // Check protection flags
             if ((prot & expectedProt) != expectedProt)
                 return false;
  
             if ((AkUIntPtr)pStart > (AkUIntPtr)address)
                 return false;
  
             address = pEnd;
         }
  
         return true;
     }
  
  
 }