| 118 | } |
| 119 | |
| 120 | void* ds_page_aligned_alloc(const int64_t size, const bool lock) |
| 121 | { |
| 122 | void* ptr; |
| 123 | int retval; |
| 124 | |
| 125 | retval = posix_memalign(&ptr, (size_t)sysconf(_SC_PAGESIZE), size); |
| 126 | if (retval) { return nullptr; } |
| 127 | |
| 128 | if (lock == false) { return ptr; } |
| 129 | |
| 130 | auto mlock_ret = mlock(ptr, size); |
| 131 | if (mlock_ret != 0) { |
| 132 | auto mlock_error = errno; |
| 133 | std::cerr << "mlock failed to allocate " << size << " bytes with error no " << mlock_error |
| 134 | << " msg " << strerror(mlock_error) << std::endl; |
| 135 | free(ptr); |
| 136 | return nullptr; |
| 137 | } |
| 138 | |
| 139 | return ptr; |
| 140 | } |