Pt
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Data Structures | |
| struct | pt |
Modules | |
| Local continuations | |
Files | |
| file | pt.h |
Defines | |
| #define | PT_WAITING 0 |
| #define | PT_EXITED 1 |
| #define | PT_ENDED 2 |
| #define | PT_YIELDED 3 |
Initialization | |
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| #define | PT_INIT(pt) |
Declaration and definition | |
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| #define | PT_THREAD(name_args) |
| #define | PT_BEGIN(pt) |
| #define | PT_END(pt) |
Blocked wait | |
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| #define | PT_WAIT_UNTIL(pt, condition) |
| #define | PT_WAIT_WHILE(pt, cond) |
Hierarchical protothreads | |
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| #define | PT_WAIT_THREAD(pt, thread) |
| #define | PT_SPAWN(pt, child, thread) |
Exiting and restarting | |
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| #define | PT_RESTART(pt) |
| #define | PT_EXIT(pt) |
Calling a protothread | |
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| #define | PT_SCHEDULE(f) |
Yielding from a protothread | |
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| #define | PT_YIELD(pt) |
| #define | PT_YIELD_UNTIL(pt, cond) |
| Yield from the protothread until a condition occurs. | |
Define Documentation
| #define PT_BEGIN | ( | pt | ) |
Declare the start of a protothread inside the C function implementing the protothread.
This macro is used to declare the starting point of a protothread. It should be placed at the start of the function in which the protothread runs. All C statements above the PT_BEGIN() invokation will be executed each time the protothread is scheduled.
- Parameters:
-
pt A pointer to the protothread control structure.
| #define PT_END | ( | pt | ) |
Declare the end of a protothread.
This macro is used for declaring that a protothread ends. It must always be used together with a matching PT_BEGIN() macro.
- Parameters:
-
pt A pointer to the protothread control structure.
| #define PT_ENDED 2 |
| #define PT_EXIT | ( | pt | ) |
Exit the protothread.
This macro causes the protothread to exit. If the protothread was spawned by another protothread, the parent protothread will become unblocked and can continue to run.
- Parameters:
-
pt A pointer to the protothread control structure.
| #define PT_EXITED 1 |
| #define PT_INIT | ( | pt | ) |
Initialize a protothread.
Initializes a protothread. Initialization must be done prior to starting to execute the protothread.
- Parameters:
-
pt A pointer to the protothread control structure.
- See also:
- PT_SPAWN()
| #define PT_RESTART | ( | pt | ) |
Restart the protothread.
This macro will block and cause the running protothread to restart its execution at the place of the PT_BEGIN() call.
- Parameters:
-
pt A pointer to the protothread control structure.
| #define PT_SCHEDULE | ( | f | ) |
Schedule a protothread.
This function shedules a protothread. The return value of the function is non-zero if the protothread is running or zero if the protothread has exited.
- Parameters:
-
f The call to the C function implementing the protothread to be scheduled
| #define PT_SPAWN | ( | pt, | |||
| child, | |||||
| thread | ) |
Spawn a child protothread and wait until it exits.
This macro spawns a child protothread and waits until it exits. The macro can only be used within a protothread.
- Parameters:
-
pt A pointer to the protothread control structure. child A pointer to the child protothread's control structure. thread The child protothread with arguments
| #define PT_THREAD | ( | name_args | ) |
Declaration of a protothread.
This macro is used to declare a protothread. All protothreads must be declared with this macro.
- Parameters:
-
name_args The name and arguments of the C function implementing the protothread.
| #define PT_WAIT_THREAD | ( | pt, | |||
| thread | ) |
Block and wait until a child protothread completes.
This macro schedules a child protothread. The current protothread will block until the child protothread completes.
- Note:
- The child protothread must be manually initialized with the PT_INIT() function before this function is used.
- Parameters:
-
pt A pointer to the protothread control structure. thread The child protothread with arguments
- See also:
- PT_SPAWN()
| #define PT_WAIT_UNTIL | ( | pt, | |||
| condition | ) |
Block and wait until condition is true.
This macro blocks the protothread until the specified condition is true.
- Parameters:
-
pt A pointer to the protothread control structure. condition The condition.
| #define PT_WAIT_WHILE | ( | pt, | |||
| cond | ) |
Block and wait while condition is true.
This function blocks and waits while condition is true. See PT_WAIT_UNTIL().
- Parameters:
-
pt A pointer to the protothread control structure. cond The condition.
| #define PT_WAITING 0 |
| #define PT_YIELD | ( | pt | ) |
Yield from the current protothread.
This function will yield the protothread, thereby allowing other processing to take place in the system.
- Parameters:
-
pt A pointer to the protothread control structure.
| #define PT_YIELD_UNTIL | ( | pt, | |||
| cond | ) |
Yield from the protothread until a condition occurs.
- Parameters:
-
pt A pointer to the protothread control structure. cond The condition.
This function will yield the protothread, until the specified condition evaluates to true.
| #define PT_YIELDED 3 |
