
test
mbed/platform/CThunkBase.h@0:d383e2dee0f7, 2020-07-06 (annotated)
- Committer:
- ommpy
- Date:
- Mon Jul 06 17:18:59 2020 +0530
- Revision:
- 0:d383e2dee0f7
first commit
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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ommpy | 0:d383e2dee0f7 | 1 | /* mbed Microcontroller Library |
ommpy | 0:d383e2dee0f7 | 2 | * Copyright (c) 2018-2018 ARM Limited |
ommpy | 0:d383e2dee0f7 | 3 | * SPDX-License-Identifier: Apache-2.0 |
ommpy | 0:d383e2dee0f7 | 4 | * |
ommpy | 0:d383e2dee0f7 | 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
ommpy | 0:d383e2dee0f7 | 6 | * you may not use this file except in compliance with the License. |
ommpy | 0:d383e2dee0f7 | 7 | * You may obtain a copy of the License at |
ommpy | 0:d383e2dee0f7 | 8 | * |
ommpy | 0:d383e2dee0f7 | 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
ommpy | 0:d383e2dee0f7 | 10 | * |
ommpy | 0:d383e2dee0f7 | 11 | * Unless required by applicable law or agreed to in writing, software |
ommpy | 0:d383e2dee0f7 | 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
ommpy | 0:d383e2dee0f7 | 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
ommpy | 0:d383e2dee0f7 | 14 | * See the License for the specific language governing permissions and |
ommpy | 0:d383e2dee0f7 | 15 | * limitations under the License. |
ommpy | 0:d383e2dee0f7 | 16 | */ |
ommpy | 0:d383e2dee0f7 | 17 | |
ommpy | 0:d383e2dee0f7 | 18 | #ifndef __CTHUNK_BASE_H__ |
ommpy | 0:d383e2dee0f7 | 19 | #define __CTHUNK_BASE_H__ |
ommpy | 0:d383e2dee0f7 | 20 | |
ommpy | 0:d383e2dee0f7 | 21 | /* IRQ/Exception compatible thunk entry function */ |
ommpy | 0:d383e2dee0f7 | 22 | typedef void (*CThunkEntry)(void); |
ommpy | 0:d383e2dee0f7 | 23 | |
ommpy | 0:d383e2dee0f7 | 24 | class CThunkBase { |
ommpy | 0:d383e2dee0f7 | 25 | protected: |
ommpy | 0:d383e2dee0f7 | 26 | typedef void (*Trampoline)(CThunkBase *); |
ommpy | 0:d383e2dee0f7 | 27 | |
ommpy | 0:d383e2dee0f7 | 28 | Trampoline _trampoline; |
ommpy | 0:d383e2dee0f7 | 29 | |
ommpy | 0:d383e2dee0f7 | 30 | /* |
ommpy | 0:d383e2dee0f7 | 31 | * Allocate a CThunkEntry which can be called without arguments |
ommpy | 0:d383e2dee0f7 | 32 | * |
ommpy | 0:d383e2dee0f7 | 33 | * Calling the CThunkEntry invokes the _trampoline of the |
ommpy | 0:d383e2dee0f7 | 34 | * given cthunk. This function traps if there are no more |
ommpy | 0:d383e2dee0f7 | 35 | * free thunks. |
ommpy | 0:d383e2dee0f7 | 36 | */ |
ommpy | 0:d383e2dee0f7 | 37 | static CThunkEntry cthunk_alloc(CThunkBase *cthunk); |
ommpy | 0:d383e2dee0f7 | 38 | |
ommpy | 0:d383e2dee0f7 | 39 | /* |
ommpy | 0:d383e2dee0f7 | 40 | * Free a cthunk_entry so it can be reused |
ommpy | 0:d383e2dee0f7 | 41 | */ |
ommpy | 0:d383e2dee0f7 | 42 | static void cthunk_free(CThunkEntry cthunk_entry); |
ommpy | 0:d383e2dee0f7 | 43 | |
ommpy | 0:d383e2dee0f7 | 44 | private: |
ommpy | 0:d383e2dee0f7 | 45 | typedef void (*CthunkFree)(CThunkEntry cthunk_entry); |
ommpy | 0:d383e2dee0f7 | 46 | |
ommpy | 0:d383e2dee0f7 | 47 | /* |
ommpy | 0:d383e2dee0f7 | 48 | * Table of thunk functions |
ommpy | 0:d383e2dee0f7 | 49 | */ |
ommpy | 0:d383e2dee0f7 | 50 | static const CThunkEntry _thunk_table[MBED_CONF_PLATFORM_CTHUNK_COUNT_MAX]; |
ommpy | 0:d383e2dee0f7 | 51 | |
ommpy | 0:d383e2dee0f7 | 52 | /* |
ommpy | 0:d383e2dee0f7 | 53 | * Table of active CThunk classes |
ommpy | 0:d383e2dee0f7 | 54 | */ |
ommpy | 0:d383e2dee0f7 | 55 | static CThunkBase *_thunk_storage[MBED_CONF_PLATFORM_CTHUNK_COUNT_MAX]; |
ommpy | 0:d383e2dee0f7 | 56 | |
ommpy | 0:d383e2dee0f7 | 57 | /* |
ommpy | 0:d383e2dee0f7 | 58 | * Lazily initialized free function pointer |
ommpy | 0:d383e2dee0f7 | 59 | */ |
ommpy | 0:d383e2dee0f7 | 60 | static CthunkFree _cthunk_free_real; |
ommpy | 0:d383e2dee0f7 | 61 | |
ommpy | 0:d383e2dee0f7 | 62 | /* |
ommpy | 0:d383e2dee0f7 | 63 | * Actual free function |
ommpy | 0:d383e2dee0f7 | 64 | */ |
ommpy | 0:d383e2dee0f7 | 65 | static void cthunk_free_real(CThunkEntry cthunk_entry); |
ommpy | 0:d383e2dee0f7 | 66 | |
ommpy | 0:d383e2dee0f7 | 67 | /* |
ommpy | 0:d383e2dee0f7 | 68 | * Template function which stored in the _thunk_table |
ommpy | 0:d383e2dee0f7 | 69 | */ |
ommpy | 0:d383e2dee0f7 | 70 | template<int N> |
ommpy | 0:d383e2dee0f7 | 71 | static void thunk_entry() |
ommpy | 0:d383e2dee0f7 | 72 | { |
ommpy | 0:d383e2dee0f7 | 73 | _thunk_storage[N]->_trampoline(_thunk_storage[N]); |
ommpy | 0:d383e2dee0f7 | 74 | } |
ommpy | 0:d383e2dee0f7 | 75 | }; |
ommpy | 0:d383e2dee0f7 | 76 | |
ommpy | 0:d383e2dee0f7 | 77 | #endif/*__CTHUNK_BASE_H__*/ |
ommpy | 0:d383e2dee0f7 | 78 |