duckstation

duckstation, but archived from the revision just before upstream changed it to a proprietary software project, this version is the libre one
git clone https://git.neptards.moe/u3shit/duckstation.git
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Allocator.c (4463B)

      1 /***************************************************************************************************
      2 
      3   Zyan Core Library (Zycore-C)
      4 
      5   Original Author : Florian Bernd
      6 
      7  * Permission is hereby granted, free of charge, to any person obtaining a copy
      8  * of this software and associated documentation files (the "Software"), to deal
      9  * in the Software without restriction, including without limitation the rights
     10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     11  * copies of the Software, and to permit persons to whom the Software is
     12  * furnished to do so, subject to the following conditions:
     13  *
     14  * The above copyright notice and this permission notice shall be included in all
     15  * copies or substantial portions of the Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     23  * SOFTWARE.
     24 
     25 ***************************************************************************************************/
     26 
     27 #include <Zycore/Allocator.h>
     28 #include <Zycore/LibC.h>
     29 
     30 /* ============================================================================================== */
     31 /* Internal functions                                                                             */
     32 /* ============================================================================================== */
     33 
     34 /* ---------------------------------------------------------------------------------------------- */
     35 /* Default allocator                                                                              */
     36 /* ---------------------------------------------------------------------------------------------- */
     37 
     38 #ifndef ZYAN_NO_LIBC
     39 
     40 static ZyanStatus ZyanAllocatorDefaultAllocate(ZyanAllocator* allocator, void** p,
     41     ZyanUSize element_size, ZyanUSize n)
     42 {
     43     ZYAN_ASSERT(allocator);
     44     ZYAN_ASSERT(p);
     45     ZYAN_ASSERT(element_size);
     46     ZYAN_ASSERT(n);
     47 
     48     ZYAN_UNUSED(allocator);
     49 
     50     *p = ZYAN_MALLOC(element_size * n);
     51     if (!*p)
     52     {
     53         return ZYAN_STATUS_NOT_ENOUGH_MEMORY;
     54     }
     55 
     56     return ZYAN_STATUS_SUCCESS;
     57 }
     58 
     59 static ZyanStatus ZyanAllocatorDefaultReallocate(ZyanAllocator* allocator, void** p,
     60     ZyanUSize element_size, ZyanUSize n)
     61 {
     62     ZYAN_ASSERT(allocator);
     63     ZYAN_ASSERT(p);
     64     ZYAN_ASSERT(element_size);
     65     ZYAN_ASSERT(n);
     66 
     67     ZYAN_UNUSED(allocator);
     68 
     69     void* const x = ZYAN_REALLOC(*p, element_size * n);
     70     if (!x)
     71     {
     72         return ZYAN_STATUS_NOT_ENOUGH_MEMORY;
     73     }
     74     *p = x;
     75 
     76     return ZYAN_STATUS_SUCCESS;
     77 }
     78 
     79 static ZyanStatus ZyanAllocatorDefaultDeallocate(ZyanAllocator* allocator, void* p,
     80     ZyanUSize element_size, ZyanUSize n)
     81 {
     82     ZYAN_ASSERT(allocator);
     83     ZYAN_ASSERT(p);
     84     ZYAN_ASSERT(element_size);
     85     ZYAN_ASSERT(n);
     86 
     87     ZYAN_UNUSED(allocator);
     88     ZYAN_UNUSED(element_size);
     89     ZYAN_UNUSED(n);
     90 
     91     ZYAN_FREE(p);
     92 
     93     return ZYAN_STATUS_SUCCESS;
     94 }
     95 
     96 #endif // ZYAN_NO_LIBC
     97 
     98 /* ---------------------------------------------------------------------------------------------- */
     99 
    100 /* ============================================================================================== */
    101 /* Exported functions                                                                             */
    102 /* ============================================================================================== */
    103 
    104 ZyanStatus ZyanAllocatorInit(ZyanAllocator* allocator, ZyanAllocatorAllocate allocate,
    105     ZyanAllocatorAllocate reallocate, ZyanAllocatorDeallocate deallocate)
    106 {
    107     if (!allocator || !allocate || !reallocate || !deallocate)
    108     {
    109         return ZYAN_STATUS_INVALID_ARGUMENT;
    110     }
    111 
    112     allocator->allocate   = allocate;
    113     allocator->reallocate = reallocate;
    114     allocator->deallocate = deallocate;
    115 
    116     return ZYAN_STATUS_SUCCESS;
    117 }
    118 
    119 #ifndef ZYAN_NO_LIBC
    120 
    121 ZyanAllocator* ZyanAllocatorDefault(void)
    122 {
    123     static ZyanAllocator allocator =
    124     {
    125         &ZyanAllocatorDefaultAllocate,
    126         &ZyanAllocatorDefaultReallocate,
    127         &ZyanAllocatorDefaultDeallocate
    128     };
    129     return &allocator;
    130 }
    131 
    132 #endif
    133 
    134 /* ============================================================================================== */