diff options
Diffstat (limited to 'coro.h')
| -rw-r--r-- | coro.h | 40 |
1 files changed, 35 insertions, 5 deletions
@@ -59,6 +59,9 @@ * 2008-11-03 Use a global asm statement for CORO_ASM, idea by pippijn. * 2008-11-05 Hopefully fix misaligned stacks with CORO_ASM/SETJMP. * 2008-11-07 rbp wasn't saved in CORO_ASM on x86_64. + * introduce coro_destroy, which is a nop except for pthreads. + * speed up CORO_PTHREAD. Do no longer leak threads either. + * coro_create now allows one to create source coro_contexts. */ #ifndef CORO_H @@ -139,8 +142,14 @@ typedef struct coro_context coro_context; * uninitialised coro_context, it expects a pointer to the entry function * and the single pointer value that is given to it as argument. * - * Allocating/deallocating the stack is your own responsibility, so there is - * no coro_destroy function. + * Allocating/deallocating the stack is your own responsibility. + * + * As a special case, if coro, arg, sptr and ssize are all zero, + * then an "empty" coro_contetx will be created that is suitable + * as an initial source for coro_transfer. + * + * This function is not reentrant, but putting a mutex around it + * will work. */ void coro_create (coro_context *ctx, /* an uninitialised coro_context */ coro_func coro, /* the coroutine code to be executed */ @@ -152,8 +161,22 @@ void coro_create (coro_context *ctx, /* an uninitialised coro_context */ * The following prototype defines the coroutine switching function. It is * usually implemented as a macro, so watch out. * -void coro_transfer(coro_context *prev, coro_context *next); + * This function is thread-safe and reentrant. */ +#if 0 +void coro_transfer (coro_context *prev, coro_context *next); +#endif + +/* + * The following prototype defines the coroutine destroy function. It is + * usually implemented as a macro, so watch out. It also serves + * no purpose unless you want to use the CORO_PTHREAD backend. + * + * This function is thread-safe and reentrant. + */ +#if 0 +void coro_destroy (coro_context *ctx); +#endif /* * That was it. No other user-visible functions are implemented here. @@ -189,6 +212,7 @@ struct coro_context { }; # define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc)) +# define coro_destroy(ctx) (void *)(ctx) #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX @@ -208,6 +232,8 @@ struct coro_context { # define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while (0) # endif +# define coro_destroy(ctx) (void *)(ctx) + #elif CORO_ASM struct coro_context { @@ -217,17 +243,21 @@ struct coro_context { void __attribute__ ((__noinline__, __regparm__(2))) coro_transfer (coro_context *prev, coro_context *next); +# define coro_destroy(ctx) (void *)(ctx) + #elif CORO_PTHREAD -#include <pthread.h> +# include <pthread.h> extern pthread_mutex_t coro_mutex; struct coro_context { - pthread_cond_t c; + pthread_cond_t cv; + pthread_t id; }; void coro_transfer (coro_context *prev, coro_context *next); +void coro_destroy (coro_context *ctx); #endif |